Networking | Quiz

Frage 1 von 200

1

In version field of IPv4 header, when machine is using some other version of IPv4 then datagram is

Wähle eine der folgenden:

Rejected
Accepted
Interpreted
Interpreted incorrectly

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Frage 2 von 200

1

Network layer at source is responsible for creating a packet from data coming from another

Wähle eine der folgenden:

Station
Link
Node
Protocol

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Frage 3 von 200

1

Header of datagram in IPv4 has

Wähle eine der folgenden:

0 to 20 bytes
20 to 40 bytes
20 to 60 bytes
20 to 80 bytes

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Frage 4 von 200

1

An IPv4 datagram can encapsulate data from several higher-level protocols such as UDP, ICMP, IGMP and

Wähle eine der folgenden:

TCP protocols
CDM protocols
ATM protocols
IEEE protocols

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Frage 5 von 200

1

To record Internet routers of IPv4, that handles datagram is responsibility of

Wähle eine der folgenden:

Record protocol
Record Data
Record Route
Record Header

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Frage 6 von 200

1

Internet has chosen datagram approach to switching in the

Wähle eine der folgenden:

Data Link Layer
Network Layer
Physical Layer
Presentation Layer

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Frage 7 von 200

1

In IPv4 protocol, each datagram is handled

Wähle eine der folgenden:

Independently
Dependently
Priority basis
Systematically

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Frage 8 von 200

1

CCT stands fo

Wähle eine der folgenden:

Close Circuit Transmission
Congestion Controlled Traffic
Congestion Controlled Transmission
Close Circuit Traffic

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Frage 9 von 200

1

Communication between a computer and a keyboard involves ______________ transmission

Wähle eine der folgenden:

Automatic
Half-duplex
Full-duplex
Single direction

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Frage 10 von 200

1

Three or more devices share a link in ________ connection

Wähle eine der folgenden:

Unipoint
Multipoint
Point to point
None

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Frage 11 von 200

1

In asynchronous serial communication the physical layer provide

Wähle eine der folgenden:

start and stop signalling
flow control
both start & stop signalling and flow control
none

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Frage 12 von 200

1

The physical layer is responsible for

Wähle eine der folgenden:

line coding
channel coding
modulation
all of the mentioned

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Frage 13 von 200

1

A single channel is shared by multiple signals by

Wähle eine der folgenden:

analog modulation
digital modulation
multiplexing
none

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Frage 14 von 200

1

Wireless transmission can be done via

Wähle eine der folgenden:

radio waves
microwaves
infrared
all of the mentioned

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Frage 15 von 200

1

Which is not a application layer protocol?

Wähle eine der folgenden:

HTTP
SMTP
FTP
TCP

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Frage 16 von 200

1

The packet of information at the application layer is called __________

Wähle eine der folgenden:

Packet
Message
Segment
Frame

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Frage 17 von 200

1

Which one of the following is an architecture paradigms?

Wähle eine der folgenden:

Peer to peer
Client-server
HTTP
Both Peer-to-Peer & Client-Server

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Frage 18 von 200

1

Application layer offers _______ service

Wähle eine der folgenden:

End to end
Process to process
Both End to end and Process to process
None of the mentioned

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Frage 19 von 200

1

E-mail is _________

Wähle eine der folgenden:

Loss-tolerant application
Bandwidth-sensitive application
Elastic application
None of the mentioned

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Frage 20 von 200

1

To deliver a message to the correct application program running on a host, the _______ address must be consulted

Wähle eine der folgenden:

IP
MAC
Port
None

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Frage 21 von 200

1

Layers four and five of the Internet protocol stack are implemented in the end systems but not in the routers in the network core

Wähle eine der folgenden:

True
False

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Frage 22 von 200

1

With ADSL, each subscriber gets more downstream bandwidth than upstream bandwidth

Wähle eine der folgenden:

True
False

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Frage 23 von 200

1

Two packets A and B are sent in that order through a connection-oriented communication network. They could arrive at the destination:

Wähle eine der folgenden:

in any order, after having traversed the same route.
only in the order A-B, after possibly having traversed different routes.
in any order, after possibly having traversed different routes
only in the order A-B, after having traversed the same route.

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Frage 24 von 200

1

Two packets A and B are sent in that order through a connectionless communication network. They will arrive at the destination:

Wähle eine der folgenden:

in any order, after possibly having traversed
in the order A-B, after having traversed the same route
in any order, after having traversed the same route.
in the order A-B, after possibly having traversed different routes

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Frage 25 von 200

1

The Internet received its name in the 1980s because:

Wähle eine der folgenden:

it was an interim (temporary) design of what it later became, but the name stuck.
it was meant to be a network internal to the United States Department of Defense.
it consisted of many interconnected networks.
it achieved international scope with the addition of the City University of London.

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Frage 26 von 200

1

All store-and-forward networks are

Wähle eine der folgenden:

broadcast networks.
packet or message switched networks.
connection-based networks.
connectionless networks.

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Frage 27 von 200

1

When a student in Hong Kong uses her computer to have a voice conversation with a teacher in Pittsburgh, the application she uses requires that the network deliver bits at a modest but constant bit rate. This is because, even though voice can be faithfully encoded in less than 64 Kbps, the late arrival of a voice sample produces a noticeable and unpleasant sound effect. Which of the following switching options will give you better quality?

Wähle eine der folgenden:

Packet-switched
Message-switched.
Space-switched.
Circuit-switched

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Frage 28 von 200

1

The Date: header in the HTTP response message indicates when the object in the response was last modified.

Wähle eine der folgenden:

True
False

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Frage 29 von 200

1

The process that sends messages into, and receives messages from, the network through a software interface is called a socket.

Wähle eine der folgenden:

True
False

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Frage 30 von 200

1

The transfer of an html file from one host to another is:

Wähle eine der folgenden:

loss-tolerant and time sensitive
loss-intolerant and time sensitive.
loss-intolerant and time insensitive.
none of the above

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Frage 31 von 200

1

A browser will generate header lines as a function of

Wähle eine der folgenden:

browser type and version.
user configuration of browser.whether the browser has a cached version of the requested object.
whether the browser has a cached version of the requested object.
all of the above

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Frage 32 von 200

1

SMTP is used to:

Wähle eine der folgenden:

to transfer messages from one mail server to another
to transfer messages from mail server to a user agent.
to define the format of message headers.
all of the above.

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Frage 33 von 200

1

DNS resource record has Type=MX. Then:

Wähle eine der folgenden:

Value is the hostname of the DNS server that is authoritative for Name.
Value is the IP address of the mail server that has the alias hostname Name.
Value is the hostname of the mail server that has the alias hostname Name.
none of the above.

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Frage 34 von 200

1

Local DNS name servers:

Wähle eine der folgenden:

cache resource records, but discard them after a period of time that is on the order of a few days
cache resource records and never discard them.
obtain resource records from Web caches.
never cache resource records

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Frage 35 von 200

1

Consider an HTTP Web server using persistent connections. Suppose the server spawns a separate process for each client that connects to the server. Then each of these spawned processes will have different server port numbers.

Wähle eine der folgenden:

True
False

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Frage 36 von 200

1

The size of the TCP RcvWindow never changes throughout the duration of the connection

Wähle eine der folgenden:

True
False

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Frage 37 von 200

1

The TCP segment has a field in its header for RcvWindow

Wähle eine der folgenden:

True
False

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Frage 38 von 200

1

Suppose host A sends host B one segment with sequence number 38 and 4 bytes of data. Then in this same segment the acknowledgement number is necessarily 42

Wähle eine der folgenden:

True
False

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Frage 39 von 200

1

The MSS is the maximum size of a TCP segment including headers

Wähle eine der folgenden:

True
False

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Frage 40 von 200

1

When a TCP segment arrives to a host, the socket to which the segment is directed depends on

Wähle eine der folgenden:

the source IP address of the datagram that encapsulated the segment
the destination port numbe
the source port number
all of the above

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Frage 41 von 200

1

UDP has which of the following characteristics

Wähle eine der folgenden:

regulated send rate
connection state at the server
three-way hand shake for connection establishment
none of the above

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Frage 42 von 200

1

When a UDP segment arrives to a host, in order to direct the segment to the appropriate socket, the OS uses

Wähle eine der folgenden:

the source port number
the source IP address
the destination port number
all of the above

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Frage 43 von 200

1

The stop-and-wait protocol is highly inefficient when there is a

Wähle eine der folgenden:

large distance between source and destination and the transmission rate is low
short distance between source and destination and the transmission rate is high
large distance between source and destination and the transmission rate is high
short distance between source and destination and the transmission rate is low

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Frage 44 von 200

1

Pipelining requires which of the following

Wähle eine der folgenden:

transmitting many packets before receiving acknowledgements
unique sequence numbers for each in-transit packet
sender-side buffering of unacknowledged packets
all of the above

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Frage 45 von 200

1

Suppose a client sends an HTTP request message with the If-modified-since: header. Suppose the object in a server has not changed since the last time a client retrieved the object. Then the server will send a response message with the status code

Wähle eine der folgenden:

404 Not Foun
200 OK
304 Not Modified
none of the above

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Frage 46 von 200

1

Streams are not needed in which of the following programs

Wähle eine der folgenden:

TCPserver
UDPserver
TCPclient
UDPclient

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Frage 47 von 200

1

For BitTorrent, which of the following is true

Wähle eine der folgenden:

Although a peer may have 50 concurrent TCP connections with other peers, at any given instant of time it sends data to less than 10 other peers.
At a given instant of time, a peer A may upload to a peer B, even if peer B is not sending anything to A.
Among the chunks that a peer does not have, the peer will request chunks that appear to be relatively rare in the torrent.
All of the above

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Frage 48 von 200

1

Consider the latency model for dynamic congestion windows. Which of the following components contribute to latency?

Wähle eine der folgenden:

the sum of all the stalled times
round trip time, RTT
the transmission time of the object, O/R
all of the above

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Frage 49 von 200

1

TCP applies fast retransmit to a segment when

Wähle eine der folgenden:

it estimates unusually large RTTs
it receives three ACKs for an earlier segment
the segment's timer expires
none of the above

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Frage 50 von 200

1

Nmap is often used to

Wähle eine der folgenden:

do port scans over a range of ports at a target host
measure throughput between hosts
measure round-trip times between hosts
decipher encrypted traffic

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Frage 51 von 200

1

With SYN cookies, when a server receives a SYN segment, it returns a SYNACK with

Wähle eine der folgenden:

an initial sequence number that is a hash of the IP addresses and port numbers in the SYN segment (as well as of other things)
initial sequence number 1
a randomly chosen initial sequence number
none of the above

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Frage 52 von 200

1

Before sending a packet into a datagram network, the source must determine all of the links that packet will traverse between source and destination

Wähle eine der folgenden:

True
False

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Frage 53 von 200

1

The primary role of a router is to forward datagrams from input links to output links

Wähle eine der folgenden:

True
False

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Frage 54 von 200

1

A forwarding table is

Wähle eine der folgenden:

Used to find the proper interface to which the input interface should forward a packet
Configured using a centralized routing algorithm
Configured through routing protocol messages received by router
A and C
B and C

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Frage 55 von 200

1

How are routing paths calculated?

Wähle eine der folgenden:

The full route is mapped out in the datagram’s header.
Paths are calculated by routing algorithms.
Datagrams always flow on the same path and don’t need to be calculated.
The path is calculated based on available network bandwidth

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Frage 56 von 200

1

A channel partitioning protocol has which of the following characteristics forwarding table is

Wähle eine der folgenden:

it does not generate collisions.
all transmitting nodes get the same amount of bandwidth.
there is no master node.
all of the above

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Frage 57 von 200

1

Match the following network service to the correct definition

Wähle eine der folgenden:

Guaranteed Delivery - Guarantees a packet will arrive at its destination
Guaranteed Delivery with Bounded Delay- Guarantees delivery within a specified host-to-host delay bound
Guaranteed Maximum Jitter - Guarantees the amount of time between the transmission of two successive packets at the sender is
equal to the amount of time between their receipt at the destination.
Я НЕ ЗНАЮ КАК ДОБАВИТЬ DROP DOWN ВОПРОС ПОЭТОМУ ПРОСТО ЗАПОМНИ ORDER

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Frage 58 von 200

1

An ARP query packet is encapsulated in an IP datagram.

Wähle eine der folgenden:

a link-layer frame addressed to a specific adapter.
a link-layer broadcast frame.
none of the above

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Frage 59 von 200

1

Ethernet provides which of the following services to the network layer
error detection

Wähle eine der folgenden:

error detection
flow control
reliable data transfer
all of the above

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Frage 60 von 200

1

For Ethernet, if an adapter determines that a frame it has just received is addressed to a different adapter

Wähle eine der folgenden:

it discards the frame without sending an error message to the network layer.
it discards the frame and sends an error message to the network layer.
it sends a NACK (not acknowledged frame) to the sending host.
it delivers the frame to the network layer, and lets the network layer decide what to do

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Frage 61 von 200

1

A beacon frame sent by an AP includes

Wähle eine der folgenden:

the AP's SSID.
the AP's MAC address.
both the AP's MAC address and SSID.
none of the above

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Frage 62 von 200

1

Packets sent by two stations in 802.11 can collide because

Wähle eine der folgenden:

at a given time, the random backoff values of the two stations are the same.
the packets are sent to different APs but on the same channel.
the two stations could be hidden from each other.
all of the above

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Frage 63 von 200

1

An 802.11 frame includes

Wähle eine der folgenden:

an acknowledgement field.
a sequence number field.
four address fields.
all of the above

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Frage 64 von 200

1

Which of the following statements best describes the purpose of the SNMP protocol?

Wähle eine der folgenden:

The SNMP protocol specifies the actions a network manager should take in response to a specific set of network fault conditions.
The SNMP protocol is a tool for gathering data about network conditions and executing remote actions at remote managed devices.
The SNMP protocol is used by the network manager to provision resources, such as bandwidth, server capacity and other computational/communication resources needed to meet the mission-specific needs of an enterprise

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Frage 65 von 200

1

What is the purpose of the SNMP SetRequest message?

Wähle eine der folgenden:

To allow a managed device to request and receive a set of initial values for MIB objects in the managed device.
To allow a managing entity to query the value of a set of MIB object values in a managed device.
To allow a managing entity to set the value of one or more MIB objects in a managed device

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Frage 66 von 200

1

What is the purpose of a presentation service?

Wähle eine der folgenden:

To allow a client to inform a server that it (the client) is present and ready to receive data.
To encode, transmit, and translate data from one machine-specific format to another.
To display data in a format specified by a user.
None of the above

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Frage 67 von 200

1

Filtering in a firewall can be based on:

Wähle eine der folgenden:

source and destination IP addresses
TCP ACK bits
source and destination port numbers
all of the above

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Frage 68 von 200

1

How we call the link-layer packets?

Wähle eine der folgenden:

Frames
Packets
Datagrams
Segment
Message

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Frage 69 von 200

1

What is the segment?

Wähle eine der folgenden:

application-layer packet
network-layer packet
data-link-layer packet
transport-layer packet
physical-layer packet

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Frage 70 von 200

1

Most packets use these as the inputs to the links. This means that the packet switch must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link

Wähle eine der folgenden:

Queuing delays
Store-and-forward
Reliable data
Datagram

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Frage 71 von 200

1

The housing a large number of hosts, is often used to create a powerful virtual server

Wähle eine der folgenden:

Supercomputer
Data center
Server house
Host center

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Frage 72 von 200

1

Match the following delays to the correct definition

Wähle eine der folgenden:

Processing delay
The time required to examine the packet’s header and determine where to direct the packet
Queuing delay
Packet waits to be transmitted onto the link
Transmission delay
This is the amount of time required to push all of the packet’s bits into the link
Propagation delay
Once a bit is pushed into the link, it needs to be spread to router
просто запомни ))))

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Frage 73 von 200

1

________________ is a repository of information linked together from points all over the world

Wähle eine der folgenden:

WWW
HTTP
HTML
None

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Frage 74 von 200

1

In a URL, the _______ is the full name of the file where the information is located

Wähle eine der folgenden:

Path
Protocol
Host
None

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Frage 75 von 200

1

A cookie is made by the __ and eaten by the _

Wähle eine der folgenden:

Client; client
Client; sever
Sever; server
None

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Frage 76 von 200

1

In HTTP, the first line in a request message is called a _ line; the first line in the response message is called the __ line

Wähle eine der folgenden:

Request; response
Response; request
Response; status
Header line; request
None

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Frage 77 von 200

1

DNS provides a few other important service in addition to translating hostnames to IP addresses

Wähle eine oder mehr der folgenden:

Host aliasing
Delaying the packets
Congestion control
Load distribution
Mail server aliasing

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Frage 78 von 200

1

Small piece of data sent from a website and stored in the user's web browser while the user is browsing

Wähle eine der folgenden:

Web cache
Set-cookies
Cookies
Status line

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Frage 79 von 200

1

A network entity that satisfies HTTP requests on the behalf of an origin Web server

Wähle eine der folgenden:

Web browser
Client
Root servers
Data center
Proxy server
DNS servers

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Frage 80 von 200

1

How many ports can be per IP address

Wähle eine der folgenden:

65,535
68,535
65,335
64,535
60,535

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Frage 81 von 200

1

FTP is built on _____ architecture

Wähle eine der folgenden:

Client-server
P2P
Both of the mentioned
None

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Frage 82 von 200

1

FTP uses _____ parallel TCP connections to transfer a file

Wähle eine der folgenden:

1
2
3
4

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Frage 83 von 200

1

If 5 files are transfered from server A to client B in the same session. The number of TCP connection between A and B is

Wähle eine der folgenden:

5
10
2
6

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Frage 84 von 200

1

The password is sent to the server using _____ command

Wähle eine der folgenden:

PASSWD
PASS
PASSWORD
None

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Frage 85 von 200

1

Time it takes for a small packet to travel from client to server and then back to the client

Wähle eine der folgenden:

RIP
RDT
ARP
TTL
RTT

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Frage 86 von 200

1

____________is a physical-layer device that acts on individual bits rather than frames

Wähle eine der folgenden:

A hub
A host
Switch
Router

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Frage 87 von 200

1

Define to which level of the network protocols are belong to

Wähle eine der folgenden:

IMAP,POP3, DNS, FTP, Telnet-Application layer
TCP, UDP-Transport layer
ICMP, RIP, IPv4, IPv6-Network layer
ARP, ATM, Token ring-Data Link layer
Bluetooth, 802.11-Physical layer
ПРОСТО ЗАПОМНИ ВСЕ

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Frage 88 von 200

1

___________algorithm computes the least-cost path between a source and destination using complete, global knowledge about the network

Wähle eine der folgenden:

Virtual circuit
A global routing
Forwarding
None

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Frage 89 von 200

1

Computer networks that provide only a connection service at the network layer are called

Wähle eine der folgenden:

Datagram network
Virtual-circuit networks
Network
None

Erklärung

Frage 90 von 200

1

Each time an end system wants to send a packet, it stamps the packet with the address of the destination end system and then pops the packet into the network

Wähle eine der folgenden:

Virtual-circuit networks
Network
Datagram network
None

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Frage 91 von 200

1

Determine the correct class of the following IP address: 93.44.123.184

Wähle eine der folgenden:

A
B
C
D
E

Erklärung

Frage 92 von 200

1

Determine the correct class of the following IP address: 160.23.244.224

Wähle eine der folgenden:

A
B
C
D
E

Erklärung

Frage 93 von 200

1

Convert the following IP address: 192.224.224.15 to the binary

Wähle eine der folgenden:

11000000. 11100000. 11100000. 00001111
11001100.11000111.11100011. 00001111
01010110. 01111011. 00000001. 00000001
11000100. 00000101. 01111011. 11011101

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Frage 94 von 200

1

Convert the following IP address: 93.44.123.184 to the binary

Wähle eine der folgenden:

11001100.11000111.11100011. 00001111
01010110. 01111011. 00000001. 00000001
11000100. 00000101. 01111011. 11011101
01011101. 00101100. 01111011. 10111000

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Frage 95 von 200

1

Convert the following IP address: 158.0.147.85 to the binary

Wähle eine der folgenden:

11001100.11000111.11100011. 00001111
01010110. 01111011. 00000001. 00000001
10011110. 00000000. 10010011. 01010101
11000100. 00000101. 01111011. 11011101

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Frage 96 von 200

1

set of rules that the sending of rules that the sending program must follow so that the Internecan deliver the data to the destination program is called

Wähle eine der folgenden:

Application Programming Interface (API)
DNS domain name system
Internet transport-layer protocol (TCP or UDP)
Encapsulation

Erklärung

Frage 97 von 200

1

Below provided a typical HTTP response message. Let’s take a careful look at this response message
What three sections has HTTP response message?

Wähle eine der folgenden:

What three sections has HTTP response message?
header lines, entity body, and then the URL structure.
an initial status line, entity body, conclusion.
an initial status line, six header lines, and then the entity body.
header lines, entity body, and then the response

Erklärung

Frage 98 von 200

1

Below provided a typical HTTP response message. Let’s take a careful look at this response message. It has three sections:
an initial status line, six header lines, and then the entity body
The entity body is the meat of the message—it contains.

Wähle eine der folgenden:

the information about receiver
the status line indicates that the server is using HTTP/1.1 and that everything is OK
the information about all the destination of packet
the requested object itself (represented by data data data data data)

Erklärung

Frage 99 von 200

1

Below provided a typical HTTP response message. Let’s take a careful look at this response message. It has three sections: an initial status line, six header lines, and then the entity body
In this example, the status line.

Wähle eine der folgenden:

In this example, the status line.
has the information about receiver
has the requested object itself (represented by data data data data data …)
has the information about all the destination of packet
indicates that the server is using HTTP/1.1 and that everything is OK

Erklärung

Frage 100 von 200

1

How does an operating system identify the application to which data coming in from the network should be relayed

Wähle eine der folgenden:

By the protocol with which the data was sent
Only one application at a time is given access to the network.
By the port number carried by the transport protocol
By the file extension of the data

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Frage 101 von 200

1

The IP address space is organized in a hierarchy (I) to make the routing task more scalable, (II) to decrease inefficient fragmentation of the address space (III) to give institutions managing local-area networks autonomous control over the assignment of addresses to computers

Wähle eine der folgenden:

I and III only
II only
none
I only

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Frage 102 von 200

1

Which of the following protocols are essential to the existence of the Traceroute tool? 1 IP, 2 ICMP, 3 TCP

Wähle eine der folgenden:

I and III only
II only
II and III only
I only

Erklärung

Frage 103 von 200

1

A difference between routers and switches is that

Wähle eine der folgenden:

switches connect only to hosts, whereas routers connect networks
switches hold IP routing tables only for only local subnets
routers parse, process, and modify IP headers
routers perform the same function as switches but the two are marketed in very different way

Erklärung

Frage 104 von 200

1

At which of the following layers of the OSI protocol stack can the Internet Control Message Protocol be implement. 1Network, 2transport, 3Data link

Wähle eine der folgenden:

I or II
I only
II only
III only

Erklärung

Frage 105 von 200

1

How to understand the connection-oriented protocol?

Wähle eine der folgenden:

means that before the client and server can start to send data to each other, they first need to handshake and establish a TCP connection
means that provide an application with one or more security services can also provide timing guarantees
offers a different set of services to the invoking applications

Erklärung

Frage 106 von 200

1

Layers four and five of the Internet protocol stack are implemented in the end systems but not in the routers in the network core

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 107 von 200

1

Twisted-pair cooper wire is no longer present in computer networks

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 108 von 200

1

Two packets A and B are sent in that order through a connectionless communication network. They will arrive at the destination

Wähle eine der folgenden:

in any order, after possibly having traversed different routes.
in the order A-B, after having traversed the same route.
in any order, after having traversed the same route.
in the order A-B, after possibly having traversed different routes

Erklärung

Frage 109 von 200

1

Compared to the wired transmission, wireless transmission typically has _ attenuation and _ maximum distance

Wähle eine der folgenden:

higher, longer
lower, shorter
lower, longer
higher, shorter

Erklärung

Frage 110 von 200

1

Which of the following features of Ethernet has not remained constant since the advent of the technology?

Wähle eine der folgenden:

Protocol header format
Protocol addressing
Use of CSMA-CD control
Transmission bandwidth

Erklärung

Frage 111 von 200

1

Which of the following internet applications typically transmit(s) packets over Transmission Control Protocol (TCP)? I.FTP client II.Audio streaming III.Web browser

Wähle eine der folgenden:

I, II, and III
II only
I and II only
I and III only

Erklärung

Frage 112 von 200

1

In order to maintain network stability while Transmission Control Protocol (TCP) probes for additional bandwidth, rate increases are _, and rate decreases are _

Wähle eine der folgenden:

multiplicative, additive
additive, additive
multiplicative, multiplicative
additive, multiplicative

Erklärung

Frage 113 von 200

1

Network clients use well-known _____ numbers to contact well-defined network services, such as Telnet and DNS servers

Wähle eine der folgenden:

accept
connect
listen
port

Erklärung

Frage 114 von 200

1

Multicast communication generally refers to data that is

Wähle eine der folgenden:

sent from several hosts to one host simultaneously
relayed through multiple routers
relayed through multiple bridges
sent from one host to several hosts simultaneously

Erklärung

Frage 115 von 200

1

The Internet Protocol (IP) defines the _____ layer of the Internet protocol stack

Wähle eine der folgenden:

application
transport
physical
network

Erklärung

Frage 116 von 200

1

The term packetization refers to the process of

Wähle eine der folgenden:

reassembling network packets for consumption by an application
using a digital instead of an analog transmission medium
using an analog instead of a digital transmission medium
splitting a message into fragments for network transmission

Erklärung

Frage 117 von 200

1

Which of the following statements is (are) true of network protocols?\n I.A protocol is a set of rules that facilitate communication among network applications.\n II.Only a single protocol may govern any transmission

Wähle eine der folgenden:

II only
I and II
None
I only

Erklärung

Frage 118 von 200

1

Which of the following is a protocol used for communication between a web server and a web browser?

Wähle eine der folgenden:

FTP
Telnet
World Wide Web (www)
HTTP

Erklärung

Frage 119 von 200

1

Which of the following is a disadvantage of connection-based protocols?

Wähle eine der folgenden:

Unreliable connections
High error rates
Small MTU sizes
High startup costs

Erklärung

Frage 120 von 200

1

On a network, the term authentication typically refers to the process of

Wähle eine der folgenden:

ensuring that users remain anonymous
ensuring that packets sent through the Internet cannot be intercepted
computing the checksum of packets
verifying the identity of a sender or receiver

Erklärung

Frage 121 von 200

1

Which of the following is the network-layer protocol of the Internet?

Wähle eine der folgenden:

HTTP
Telnet
Ethernet
IP

Erklärung

Frage 122 von 200

1

Which of the following was designed to solve the problem of IP address space fragmentation?

Wähle eine der folgenden:

Maximum Transfer Unit
Simple Network Management Protocol
Peering
Classless Inter Domain Routing

Erklärung

Frage 123 von 200

1

Which of the following IP header fields provide simple error detection?

Wähle eine der folgenden:

Fragmentation
Time to live
Type of service
Checksum

Erklärung

Frage 124 von 200

1

Which of the following maps IP addresses onto datalink addresses?

Wähle eine der folgenden:

Domain Name System (DNS)
Simple Network Management Protocol (SNMP)
Classless Inter Domain Routing (CIDR)
Address Resolution Protocol (ARP)

Erklärung

Frage 125 von 200

1

Consider an application running on host cs.cmu.edu that wants to send a packet to host ee.cmu.edu. Assuming no information is cached, the send request on cs.cmu.edu will cause which of the following events to happen first?

Wähle eine der folgenden:

An ARP lookup
The packet is sent to the first router.
Host cs.cmu.edu performs an SNMP server query.
A DNS lookup

Erklärung

Frage 126 von 200

1

Which of the following can be used by a router to report a dropped packet to the packet's sender?

Wähle eine der folgenden:

Simple Network Management Protocol (SNMP)
Border Gateway Protocol (BGP)
Dynamic Host Configuration Protocol (DHCP)
Internet Control Message Protocol (ICMP)

Erklärung

Frage 127 von 200

1

Which of the following IP header fields is designed to prevent a packet from remaining indefinitely in a routing loop?

Wähle eine der folgenden:

Checksum
Length
Fragmentation
Time to live

Erklärung

Frage 128 von 200

1

Which of the following allows a host to be assigned an IP address automatically?

Wähle eine der folgenden:

The simple network management protocol (SNMP)
The domain name system (DNS)
The address resolution protocol (ARP)
The dynamic host configuration protocol (DHCP)

Erklärung

Frage 129 von 200

1

Which of the following network exploration tools can be used to determine information about possible paths between one network host and another?

Wähle eine der folgenden:

Ping
Netstat
Nslookup
Traceroute

Erklärung

Frage 130 von 200

1

The time required to examine the packet's header and determine where to direct the packet is part of the

Wähle eine der folgenden:

Processing delay
Queuing delay
Transmission delay
Propagation delay

Erklärung

Frage 131 von 200

1

How we call the delay, when packet waits to be transmitted onto the link

Wähle eine der folgenden:

Processing delay
Queuing delay
Transmission delay
Propagation delay

Erklärung

Frage 132 von 200

1

This is the amount of time required to push all of the packet's bits into the link

Wähle eine der folgenden:

Processing delay
Queuing delay
Transmission delay
Propagation delay

Erklärung

Frage 133 von 200

1

The protocols of the various layers are called ___________

Wähle eine der folgenden:

protocol stack
protocol layers
protocol group
protocol models

Erklärung

Frage 134 von 200

1

Which of the following OSI layers converts the ones and zeroes to electrical signals and places these signals on the cable?

Wähle eine der folgenden:

Physical layer
Transport layer
Network layer
Application laye

Erklärung

Frage 135 von 200

1

Which of the following is most likely to be a MAC address assigned to a NIC?

Wähle eine der folgenden:

192.168.1.121
24.17.232.75
23.4F.17.8A.4C.10
713.555.1212

Erklärung

Frage 136 von 200

1

Which layer of the TCP/IP model involves routing?

Wähle eine der folgenden:

Physical layer
Transport layer
Application layer
Network layer

Erklärung

Frage 137 von 200

1

How much data can a typical frame contain?

Wähle eine der folgenden:

500 bytes
1500 bytes
1500 bits
1 megabyte

Erklärung

Frage 138 von 200

1

Which of the following best describes an IP address?

Wähle eine der folgenden:

A unique dotted decimal notation burned into every NIC
A unique 48-bit identifying number burned into every NIC
A dotted decimal notation assigned to a NIC by software
A 48-bit identifying number assigned to a NIC by software

Erklärung

Frage 139 von 200

1

Andalyn says complete 48-bit MAC addresses are allocated to NIC manufacturers from the IEEE. Buster says the IEEE only assigns the first 24 bits to manufacturers. Carlos says the IEEE assigns only the last 24 bits to manufacturers. Who is correct?

Wähle eine der folgenden:

Only Andalyn is correct.
Only Buster is correct.
Only Carlos is correct.
No one is correct

Erklärung

Frage 140 von 200

1

Host A is sending host B a large file over a TCP connection. Assume host B has no data to send to A. Host B will not send acknowledgements to host A because host B cannot piggyback the acknowledgement on data

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 141 von 200

1

A channel partitioning protocol has which of the following characteristics

Wähle eine der folgenden:

there is no master node
it does not generate collisions
all transmitting nodes get the same amount of bandwidth
all of the above

Erklärung

Frage 142 von 200

1

Ethernet provides which of the following services to the network layer

Wähle eine der folgenden:

flow control
error detection
reliable data transferreliable data transfer
all of the above

Erklärung

Frage 143 von 200

1

Each LAN adapter has a unique LAN address

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 144 von 200

1

A channel partitioning has which of the following characteristics

Wähle eine der folgenden:

there is no master node
it does not generate collisions
transmitting nodes get the same amount of bandwidth
all

Erklärung

Frage 145 von 200

1

IEEE standard ethernet CSMA/CD provides which of the following services to the network layer?

Wähle eine der folgenden:

reliable data transfer
error detection
error correction
all

Erklärung

Frage 146 von 200

1

Before sending a packet into a datagram network, the source must determine all of the links that packet will traverse between source and destination

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 147 von 200

1

The Session layer communicates with which other layers

Wähle eine der folgenden:

Application and Transport
Transport and Network
Transport and Presentation
Transport, Presentation and Network

Erklärung

Frage 148 von 200

1

application layer data is

Wähle eine der folgenden:

message
frame
datagram
data
segment

Erklärung

Frage 149 von 200

1

Transport layer data is

Wähle eine der folgenden:

message
frame
data
datagram
segment

Erklärung

Frage 150 von 200

1

Network layer data is

Wähle eine der folgenden:

message
frame
datagram
segment
data

Erklärung

Frage 151 von 200

1

Link layer data is

Wähle eine der folgenden:

message
frame
datagram
data
segment

Erklärung

Frage 152 von 200

1

HTTP persistent connection - multiple objects can be sent over single TCP connection between client, server

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 153 von 200

1

HTTP non- persistent connection - multiple objects can be sent over single TCP connection between client, server

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 154 von 200

1

SMTP is used to

Wähle eine der folgenden:

to transfer messages from one mail server to another
to transfer messages from one mail server to another user agent
to define the format of message headers
to transfer messages from one user to another

Erklärung

Frage 155 von 200

1

The transmission of high-quality, interactive voice and video over the current Internet is difficult because today's Internet

Wähle eine der folgenden:

does not really have sufficient throughput
gives higher priority to bulk data transfers
uses connectionless protocols
is unable to guarantee minimum throughput or maximum latency for a given connection

Erklärung

Frage 156 von 200

1

The throughput of a network link for an HTTP session is measured in two ways. Measurement A is the total amount of data received by the browser, divided by the duration of the session. Measurement B is the total amount of data received by the operating system on behalf of the browser, divided by the duration of the session. Which of the following statements about A and B is true?

Wähle eine der folgenden:

B is smaller than A
A is smaller than B
B is equal to A
B and A are not related

Erklärung

Frage 157 von 200

1

Ethernet (IEEE 802.3) is an example of

Wähle eine der folgenden:

a standard developed by the International Telecommunications Union
a successful example of the Internet's strategy of developing standards through "rough consensus and running code"
a de facto standard later developed into a de jure standard
an a priori standard

Erklärung

Frage 158 von 200

1

A packet with no data is sent from host A to host B on an otherwise idle network. The packet is found to have taken 35 milliseconds to reach B. The incremental overhead to send an additional byte (usually called the "throughput") is estimated to be five microseconds by repeatedly measuring the transmission times of long packets. Approximately, how long will an eight Kbytes (8192 bytes) packet take to reach B when sent from A?

Wähle eine der folgenden:

cannot be determined from the information given
55 milliseconds
40 milliseconds
76 milliseconds

Erklärung

Frage 159 von 200

1

When the data link layer applies "framing" to the data to be transmitted, it

Wähle eine der folgenden:

cuts out the headers from higher layer protocols before transmission
adds the protocol headers from higher layers to the data before it transmits it
inserts flags to draw attention to high-priority data within a transmission
enhances it with extra data that permits the receiver to synchronize with the sender

Erklärung

Frage 160 von 200

1

In a broadcast-based network, longer propagation delays

Wähle eine der folgenden:

destroy the carrier, making it impossible to sense it before transmitting
make it all the more critical to sense the carrier before transmitting
significantly decrease the benefit of sensing the carrier before transmitting
do not affect the cost-benefit trade-off of carrier sensing

Erklärung

Frage 161 von 200

1

What is the type of an "8+1" parity code that outputs 100101011?

Wähle eine der folgenden:

Odd Parity
Null Parity
Cannot tell since we do not know which bit is the parity bit
Even Parity

Erklärung

Frage 162 von 200

1

A specific CSMA-CD network such as 10-BASET "Ethernet

Wähle eine der folgenden:

has higher cost per node as nodes are added
can connect very distant node
works best for an even number of nodes
suffers performance degradation as nodes are added

Erklärung

Frage 163 von 200

1

A university has 20 computers in a laboratory that is currently served by several small 10 Base-T "Ethernet" hubs that are directly connected to each other. The network performance has been found to be lacking, and an upgrade is planned. The computers are identical and place a comparable load on the network that is relatively constant and modest for each computer (in the order of 500 Kbps). What would you suggest for the upgrade?

Wähle eine der folgenden:

A small 10 Base-T switch to connect the existing hub
Replace the hubs with 100 Base-T hub
A new bank of dial-up modems
Replace the hubs with 10 Base-T switches

Erklärung

Frage 164 von 200

1

A sender's data link layer uses "bit stuffing" to

Wähle eine der folgenden:

force the receiver to enlarge its flow control window
avoid confusing data bits with control bits
pad the data so that it has an even length for parity calculations
mark the start and the end of a frame

Erklärung

Frage 165 von 200

1

The Internet Protocol (IP) is used in the network layer of the Internet. Which service does IP provide to the transport layer?

Wähle eine der folgenden:

Connectionless service via virtual circuits
Connectionless service via datagrams
Connection-oriented service via datagrams
Connection-oriented service via virtual circuits

Erklärung

Frage 166 von 200

1

A corporate information systems manager is interested in collecting statistics on the frequency of computer failures within the organization. Most failures result in an automatic reboot, so the failed computer is typically back on the network in less than a minute. The corporate network connects 1,500 computers in far-flung locations to which the average latency of a packet is 40 milliseconds. The manager asks you to write a tool that will collect the times at which failures occurred in which computers. She wants it by tomorrow, so the tool will have to be simple. On which protocol will you base your implementation?

Wähle eine der folgenden:

TCP
SNMP
PLM
ICMP

Erklärung

Frage 167 von 200

1

A router is installed to interconnect 4 subnetworks with MTUs of 1024, 2048, 576, and 1556 bytes respectively. Nodes A and B are connected to the first and second subnets, respectively. An application on node A sends a 4096-byte datagram (e.g., using UDP) to an application on node B. How many IP fragments will the router process as a result?

Wähle eine der folgenden:

4
5
1
2

Erklärung

Frage 168 von 200

1

The network interface card of a Web server that you manage has developed sporadic problems. You measure the packet loss rate from your desktop computer and immediately decide to replace the network card. After this simple operation, the Web server successfully rejoins the network, as confirmed by your officemate using her desktop computer. You eagerly go to your desktop to measure the improvement, but find instead that the Web server is not responding to any of your packets. What is your diagnosis?

Wähle eine der folgenden:

The new network card does not work.
Your desktop computer is still trying to contact the server's old network card.
Your desktop computer's network card does not work.
The Domain Name System (DNS) has not yet updated its entry for the Web server.

Erklärung

Frage 169 von 200

1

In contrast to standards developed by traditional standards organizations like the International
Telecommunications Union (ITU) or the International Standards Organization (ISO), standards developed by the Internet Engineering Task Force (IETF) can be

Wähle eine der folgenden:

developed in secret by the members of the IETF until the standards mature sufficiently to withstand public criticism
modified arbitrarily by the Advance Research projects Agency (ARPA) of the United States Department of Defense, which originally developed the Internet
applied before they have been embodied in working implementations, in order not to delay progress
extensively critiqued and modified by individuals, without requiring them to have special membership status

Erklärung

Frage 170 von 200

1

there are transport service requirements, for which of the following applications these requirements are demanded: no data loss, elastic throughput, and not time sensitive

Wähle eine der folgenden:

e-mail
real time audio/video
text messaging
games

Erklärung

Frage 171 von 200

1

there are transport service requirements, for which of the following applications these requirements are demanded: no data loss, elastic throughput, and not time sensitive

Wähle eine der folgenden:

web documents
real time audio/video
text messaging
games

Erklärung

Frage 172 von 200

1

reliable transport between sending and receiving process refers to (protocol type)?

Wähle eine oder mehr der folgenden:

TCP
Transport control protocol
TCP service
Вы должны будете написать это поэтому запомните хоть один вариант

Erklärung

Frage 173 von 200

1

TP client contacts FTP server at port ______, using TCP

Wähle eine oder mehr der folgenden:

21
twenty one
Запомни (хоть один вариант) так как тебе нужно будет это написать

Erklärung

Frage 174 von 200

1

331 Username OK, password required – status code refers to (protocol type)?

Wähle eine oder mehr der folgenden:

Запомни (хоть один вариант) так как тебе нужно будет это написать
FTP
File transport protocol

Erklärung

Frage 175 von 200

1

e-mails use ______________ protocol for sending messages

Wähle eine der folgenden:

SMTP
FTP
HTTP
MIME

Erklärung

Frage 176 von 200

1

IMAP stands for

Wähle eine oder mehr der folgenden:

Internet Mail Access protocol
Запомни тебе надо это написать

Erklärung

Frage 177 von 200

1

POP stands for

Wähle eine der folgenden:

Запомни тебе надо это написать
post office protocol

Erklärung

Frage 178 von 200

1

Which of the following statements are true about the TCP service model?

Wähle eine der folgenden:

TCP uses a checksum to determine if the application data follows the right syntax
TCP delivers a stream of bytes from one end to the other, reliably and in-sequence, on behalf of an application
Because TCP encodes data with enough information to correct errors, it never needs to retransmit missing segments
Because TCP cannot trust the IP layer to format packets correctly, it must include the destination IP address in the TCP header
TCP is responsible for providing reliable, in-sequence end-to-end delivery of data between applications.

Erklärung

Frage 179 von 200

1

Which of the following are direct consequences of this design choice?

Wähle eine der folgenden:

TCP is self-contained with sufficient addressing information in its header that it does not need the IP layer, or any other layer beneath it to deliver data to the far end
TCP will retransmit missing data even if the application can not use it - for example, in Internet telephony a late arriving retransmission may arrive too late to be useful
TCP can only work correctly if the layer below it also delivers data reliably and in sequence
TCP requires no connection state to be established prior to the end points communicating

Erklärung

Frage 180 von 200

1

The _______ layer lies between the network layer and the application layer.

Wähle eine der folgenden:

physical
data link
transport
none

Erklärung

Frage 181 von 200

1

Which of the following is an application layer service?

Wähle eine der folgenden:

remote log-in
mail service
file transfer and access
all

Erklärung

Frage 182 von 200

1

The_________ layer is responsible for the delivery of a message from one process to another

Wähle eine der folgenden:

physical
data link
transport
network

Erklärung

Frage 183 von 200

1

The Internetworking Protocol (IP) is a ________ protocol

Wähle eine der folgenden:

reliable
connectionless
connection oriented
none

Erklärung

Frage 184 von 200

1

____ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer

Wähle eine der folgenden:

TCP
UDP
IP
HTTP

Erklärung

Frage 185 von 200

1

__________provides full transport layer services to applications

Wähle eine der folgenden:

TCP
UDP
IP
HTTP

Erklärung

Frage 186 von 200

1

Translation of a domain name into an address called

Wähle eine der folgenden:

name resolution
time needed to transmit L-bit packet into link = L (bits) / R (bits/sec)
bandwidth
packet transmission delay
rate
DNS

Erklärung

Frage 187 von 200

1

In a link layer hosts and router are called

Wähle eine der folgenden:

Node
Frame
Protocol
Server

Erklärung

Frage 188 von 200

1

Link layer encapsulates datagrad in a

Wähle eine der folgenden:

Node
Frame
Protocol
Server

Erklärung

Frage 189 von 200

1

The FDDI protocol is based on

Wähle eine der folgenden:

The token ring protocol
Transmission control Protocol
File Transfer Protocol
HTTP

Erklärung

Frage 190 von 200

1

Registered users may look up all meetings in their agenda in a given interval of time

Wähle eine der folgenden:

Querying Meetings
User Registration
Adding Meetings
Deleting Meetings
Clearing Meetings

Erklärung

Frage 191 von 200

1

Dividing the network into smaller portions called

Wähle eine der folgenden:

Subnet
Subnet Mask
Bits
IP

Erklärung

Frage 192 von 200

1

Identify the incorrect statement

Wähle eine der folgenden:

FTP sends its control information in-band
FTP stands for File Transfer Protocol
FTP uses two parallel TCP connections
FTP sends exactly one file over the data connection

Erklärung

Frage 193 von 200

1

Find the FTP reply whose message is wrongly matched

Wähle eine der folgenden:

331 – Username OK, password required
425 – Can’t open data connection
452 – Error writing file
452 – Can’t open data connection

Erklärung

Frage 194 von 200

1

Typically the TCP port used by SMTP is

Wähle eine der folgenden:

25
35
50
15

Erklärung

Frage 195 von 200

1

The entire hostname has a maximum of ___characters

Wähle eine der folgenden:

255
127
63
21

Erklärung

Frage 196 von 200

1

Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?

Wähle eine der folgenden:

HTTP
FTP
Telnet
TCP

Erklärung

Frage 197 von 200

1

All link layer protocols that support IP have the same frame structure (i.e., length of frame, number and length of header fields).

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 198 von 200

1

Suppose a network manager wanted to query the value of the number of TCP segments received by a host running the Microsoft Windows 2000 operating system in a US-based company. What would be the prefix (leading digits) of the MIB variable that should be queried?

Wähle eine oder mehr der folgenden:

1.3.6.1.2.1.1
запомни надо будет написать

Erklärung

Frage 199 von 200

1

For public-key certification, PGP uses certification authorities.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 200 von 200

1

The 802.11 protocol does not implement collision detection because

Wähle eine oder mehr der folgenden:

the adapter would still not be able to detect all collisions due to hidden terminals.
it is costly to build wireless hardware that detects collisions.
collision detection was found to be useless in wired Ethernet.
all of the above

	Erstellt von Altynay Toiguliyeva vor fast 5 Jahre