2725884
Questão 1
Questão
in the OSI Model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's ____________ Layer.
Responda
-
physical
-
transport
-
session
-
presentation
Questão 2
Questão
The _______ Layer is responsible for moving frames from on hop to the next?
Responda
-
physical
-
data link
-
transport
-
none
Questão 3
Questão
The ____ Layer is responsible for the delivery of message from one process to another
Responda
-
network
-
physical
-
transport
-
none
Questão 4
Questão
In the OSI model, encryption and decryption are functions of the _____ layer?
Responda
-
transport
-
session
-
presentation
-
application
Questão 5
Questão
Routers function in the _____ layer?
Responda
-
data link
-
data link and network
-
physical and data link
-
physical,data link, and network
Questão 6
Questão
switches function in the _____ layers.
Responda
-
data link
-
data link and network
-
physical and data link
-
physical, data link, and network
Questão 7
Questão
_______ has a higher transmission rate in the downstream direction than in the upstream direction
Responda
-
ADSL
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HDSL
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SDSL
-
VDSL
Questão 8
Questão
in an ESS the _______ stations are part of a wired LAN.
Responda
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AAL5
-
AP
-
ATM
-
BSS
Questão 9
Questão
PPP is a _______ layer protocol?
Responda
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data link
-
network
-
physical and data link
-
network and data link
Questão 10
Questão
when the internet started it was decided to make the network layer a ______ service to make it simple
Responda
-
connectionless
-
connection oriented
-
virtual
-
none
Questão 11
Questão
in a ____ service, there is a relation between all packets belonging to a message?
Responda
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connectionless
-
connection oriented
-
virtual
-
none
Questão 12
Questão
In a connection-oriented service, each packet is forwarded based on the______.
Responda
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destination address
-
label
-
source address
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none
Questão 13
Questão
_________ control means regulation the amount of data a source can send without overwhelming the destination.
Responda
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congestion
-
error
-
flow
-
none
Questão 14
Questão
______ control in a network means handling a situation in which too many packets are present in an area of the internet
Responda
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flor
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error
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congestion
-
none
Questão 15
Questão
In class C, the netid is between
Responda
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0 to 127
-
128 to 191
-
192 to 223
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none
Questão 16
Questão
In classless addressing, a ____ is assigned to an organization.
Responda
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fixed-length
-
fixed number of blocks
-
variable-length block
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none
Questão 17
Questão
The number of addresses assigned to an organization in classless addressing _____.
Responda
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can be any number
-
must be a multiple of 256
-
must be a power of 2
-
none
Questão 18
Questão
Which address could be the beginning address of a block of 32 classless addresses?
Responda
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2.4.6.5
-
2.4.6.16
-
2.4.6.64
-
none
Questão 19
Questão
An organization is granted a block: one address is 2.2.2.64/25. If the subnet prefix length is /28 what is the maximum number of subnets?
Responda
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2
-
4
-
8
-
16
-
32
-
64
Questão 20
Questão
in a _____ delivery, both the deliverer of the ip packet and the destination are on the same network.
Responda
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connection-oriented
-
connnectionless
-
direct
-
indirect
-
virtual
Questão 21
Questão
in ______ delivery, the deliverer of the ip packet and the destination are on different networks.
Responda
-
connection-oriented
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connectionless
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direct
-
indirect
Questão 22
Questão
IN _____ forwarding, the full ip address of a destination is given in the routing table
Responda
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defualt
-
host specific
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next hop
-
network specific
Questão 23
Questão
In _______ forwarding, the mask and destination address are both 0.0.0.0 in the routing table.
Responda
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deafualt
-
host specific
-
next-hop
-
network specific
Questão 24
Questão
in ______ forwarding the destination address is a network address in the routing table
Responda
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default
-
host specific
-
next hop
-
network specific
Questão 25
Questão
In ______ forwarding, the routing table holds the address of just the next hop instead of complete route info.
Responda
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default
-
host specific
-
next hop
-
network specific
Questão 26
Questão
in classsless addressing, we need routing table with atleast ______ columns
Responda
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3
-
4
-
6
-
8
Questão 27
Questão
The principle of _______ states that the routing table is sorted from longest mask to the shortest mask.
Responda
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first mask matching
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last mask matching
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longest mask matching
-
shortest mask matching
Questão 28
Questão
A ____ routing table contains information entered manually?
Responda
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dynamic
-
hierarchical
-
static
-
virtual
Questão 29
Questão
The input and output ports of a router perform the ______ layer functions of the router
Responda
-
network
-
physical and data link
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physical and network
-
transport
Questão 30
Questão
The _____ protocol is the transmission mechanism used by the tcp/ip sutie.
Responda
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ARP
-
ICMP
-
IP
-
TCP
Questão 31
Questão
IP is ______ datagram protocol
Responda
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connectionless
-
unreliable
-
both connectionless and unreliable
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none
Questão 32
Questão
AN HLEN value of decimal 10 means
Responda
-
10 bytes in the header
-
40 bytes in the header
-
10 bytes of option
-
40 bytes of option
Questão 33
Questão
if the fragment offset has a value of 100 it means that
Responda
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the datagram has not been fragmented
-
the datagram is 100 bytes in size
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the first byte of the datagram is byte 800
-
the last byte of the datagram is byte 800
Questão 34
Questão
The ip header size is _______ bytes long.
Responda
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10
-
20
-
60
-
20 to 60
Questão 35
Questão
Packets in the ip layer are called
Responda
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datagrams
-
frames
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packets
-
segments
Questão 36
Questão
When a datagram is encapsulated in a frame, the total size of the datagram must be less than the ____
Responda
-
MAT
-
MTA
-
MUT
-
MTU
Questão 37
Questão
The ______ module consults the MTU table to determine the packet size necessary for transsmission
Responda
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forwarding
-
fragmentation
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proccessiong
-
sizing
Questão 38
Questão
To find the physical address of the exiting-point router, ATM uses the service of ________
Responda
-
ARP
-
ATMARP
-
ICMP
-
IP
Questão 39
Questão
A ______ is an ARP that acts of behalf of a set of hosts
Responda
-
ARP
-
DHCP
-
RARP
-
Proxy ARP
Questão 40
Questão
in _____ mapping , a table associating a logical address with a physical address is updated manually
Responda
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dyanmic
-
static
-
logical
-
physical
Questão 41
Questão
A ______ is a local address. Its jurisdiction is over a local network
Responda
-
logical address
-
physical address
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port
-
static address
Questão 42
Questão
ICMP is a ______ layer protocol
Responda
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application
-
data link
-
network
-
transport
Questão 43
Questão
for the purposes of routing, the internet is divided into
Responda
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autonomous networks
-
autonomous systems
-
wide area networks
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none
Questão 44
Questão
routing between autonomous systems is referred to as _______ routing.
Responda
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border
-
interdomain
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intradomain
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out of domain
Questão 45
Questão
IN _____ routing, the least cost route between any two nodes is the route with the minumum distance
Responda
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distance vector
-
link state
-
path vector
Questão 46
Questão
IN _____, each node maintains a vector minimum distance to everynode
Responda
-
distance vector
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link state
-
path vector
Questão 47
Questão
in RIP, the ____ timer controls the advertising of regular update messages.
Responda
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expiration
-
garbage collection
-
periodic
Questão 48
Questão
RIP uses the services of
Responda
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ARP
-
Ethernet
-
IP
-
UDP
Questão 49
Questão
The _____ routing uses the dijkstra algorithm to build a routing table
Responda
-
distance vector
-
link state
-
path vector
Questão 50
Questão
in _____ rotuing, we assume that there is one node in each autonomous system that acts on behalf of the the entire system
Responda
-
distance vector
-
link state
-
path vector
Questão 51
Questão
The ___ protocol allows the admin to assign cost, called the metric to each route
Responda
-
BGP
-
OSPF
-
RIP
Questão 52
Questão
BGP uses the services of
Responda
-
ARP
-
IP
-
ethernet
-
UDP
-
TCP
Questão 53
Questão
The main problem that must be solved in providing mobile communication using the ip protocol is
Responda
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addressing
-
connecting
-
forwarding
-
none
Questão 54
Questão
The original IP addressing was based on the assumption that a host is ______
Responda
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stationary
-
mobile
-
moving
Questão 55
Questão
When a mobile host acts as a foreign agent, the care of address is called a ____ care of address
Responda
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co-located
-
commmon
-
shared
Questão 56
Questão
A registration request or reply is sent by ____ using a well known port 434
Responda
-
IP
-
TCP
-
UDP
Questão 57
Questão
one to many communication between one source and specific group of hosts is classified as a ______ communications
Responda
-
broadcast
-
multicast
-
unicast
Questão 58
Questão
IN ______, the router forwards the received packet through only one of its interfaces
Responda
-
broadcast
-
multicast
-
unicast
Questão 59
Questão
emulation of ____ through _____ is not efficient and may create long delays
Responda
-
broadcasting:multicasting
-
multicasting: multiple unicasting
-
unicasting: multiple unicasting
Questão 60
Questão
in multicast routing, each involved router needs to construct a ___ path tree for each group
Responda
-
average
-
longest
-
shortest
Questão 61
Questão
In the group-shared tree approach, ________ is/are involved in mulitcasting
Responda
-
all routers
-
only some routers
-
only the core router
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