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Computer Networks

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ThirdYear Third Year Quiz sobre Computer Networks, criado por Faheem Ahmed em 18-10-2017.
Faheem Ahmed
Quiz por Faheem Ahmed, atualizado more than 1 year ago
Faheem Ahmed
Criado por Faheem Ahmed quase 7 anos atrás
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Resumo de Recurso

Questão 1

Questão
An IPv4 address is _________ bits.
Responda
  • 8
  • 16
  • 32
  • 64

Questão 2

Questão
What is the class of the address 200.66.10.21?
Responda
  • A
  • B
  • C
  • D

Questão 3

Questão
What is the hostid of the address 12.11.1.21?
Responda
  • 11.1.21
  • 1.21
  • 21
  • None

Questão 4

Questão
What is the address of the network to which the host 130.8.119.1 is connected ?
Responda
  • 130.8.119.0
  • 130.8.0.0
  • 130.0.0.0
  • None

Questão 5

Questão
Which error detection method involves polynomials?
Responda
  • VRC
  • LRC
  • CRC
  • checksum

Questão 6

Questão
In cyclic redundancy checking, the divisor is _______the CRC.
Responda
  • the same size as
  • one bit less than
  • one bit more than
  • two bits more than

Questão 7

Questão
IPV6 address has ____________ bits.
Responda
  • 32
  • 64
  • 128
  • 256

Questão 8

Questão
What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?
Responda
  • 16
  • 32
  • 62
  • 30

Questão 9

Questão
You need to subnet a network that has 5 subnets, each with at least 16 hosts. Which will be your choice?
Responda
  • 255.255.255.192
  • 255.255.255.224
  • 255.255.255.240
  • 255.255.255.248

Questão 10

Questão
Which protocol does Ping use?
Responda
  • TCP
  • ARP
  • ICMP
  • DHCP

Questão 11

Questão
Which class of IP address provides a maximum of only 254 host addresses per network ID?
Responda
  • A
  • B
  • C
  • D
  • E

Questão 12

Questão
Which of the following devices takes data sent from one network device and forwards it to the destination node based on MAC address?
Responda
  • Hub
  • Switch
  • Router
  • Bridge

Questão 13

Questão
HUB is a _________ Device and Switch is a ________ Device.
Responda
  • Unicast, Multicast
  • Multicast, Unicast
  • Broadcast, Unicast
  • Unicast, Broadcast

Questão 14

Questão
The last address of IP address represents
Responda
  • Unicast address
  • Network address
  • Broadcast address
  • Multicast address

Questão 15

Questão
DNS stands for
Responda
  • Dynamic Name System
  • Dynamic Network System
  • Domain Name System
  • Domain Network Service

Questão 16

Questão
What is the size of MAC address?
Responda
  • 16 bits
  • 32 bits
  • 48 bits
  • 64 bits

Questão 17

Questão
What is the size of host bits in Class B of IP address?
Responda
  • 4
  • 8
  • 16
  • 32

Questão 18

Questão
What is the usable size of network bits in Class B of IP address?
Responda
  • 4
  • 8
  • 14
  • 16

Questão 19

Questão
Which of the following is/are protocols of Application?
Responda
  • FTP
  • DNS
  • Telnet
  • All the above.

Questão 20

Questão
Default administrative distance of Static Route
Responda
  • 0
  • 1
  • 10
  • 90
  • 100

Questão 21

Questão
Which protocol working at the Transport layer provides a connectionless service between hosts?
Responda
  • IP
  • ARP
  • TCP
  • UDP

Questão 22

Questão
What protocol is used to find the hardware address of a local device?
Responda
  • DNS
  • ARP
  • IP
  • ICMP

Questão 23

Questão
A router ?
Responda
  • forwards a packet to all outgoing links.
  • forwards a packet to all outgoing links, except the link upon which the packet originated
  • forwards a packet to the next free outgoing link
  • determines on which outgoing link a packet is to be forwarded.

Questão 24

Questão
Which command does not show that two devices are failing to route packets between them successfully?
Responda
  • show interface
  • trace
  • telnet
  • ping

Questão 25

Questão
Which of the following ranges are considered well-known port numbers?
Responda
  • 1–1023
  • 1024 and above
  • 1–256
  • 1–65534

Questão 26

Questão
Which protocol does DHCP use at the Transport layer?
Responda
  • IP
  • TCP
  • UDP
  • ARP

Questão 27

Questão
Which class of IP address has the most host addresses available by default?
Responda
  • A
  • B
  • C
  • D

Questão 28

Questão
What does the command ip route 192.168.50.0 255.255.255.0 10.2.1.3 specify?
Responda
  • The router should use network 192.168.50.0 to get to address 10.2.1.3
  • Both 192.168.50.0 and 10.2.1.3 use a mask of 255.255.255.0
  • You want the router to trace a route to network 192.168.50.0 via 10.2.1.3
  • The router should use address 10.2.1.3 to get to devices on network 192.168.50.0

Questão 29

Questão
Match the following: A. Repeaters 1. Data Link Layer B. Bridges 2. Network Layer C. Routers 3. Physical Layer
Responda
  • A --->2, B--->3, C--->1
  • A--->3, B---->1, C---->2
  • A--->3, B----->2, C---->1
  • A---->1, B---->2, C---->3

Questão 30

Questão
Which of the following is true of a Switch?
Responda
  • Switches forward packets based on IP address.
  • Switches forward packets based on MAC address.
  • Switches forward packets based on IPX address.
  • Switches forward packets based on Layer 3 address.

Questão 31

Questão
A client workstation is connected to a DHCP server through a switch and a router, The client machine has been able to access the network resources without any problem. However, after the recent configuration change on the DHCP server, the client workstation is not able to access any network resources. What is the likely solution.
Responda
  • Clear arp cache on the router
  • Use ipconfig command with /release and /renew options
  • Reset switch MAC address table
  • Issue a tracert command to DHCP server

Questão 32

Questão
Match the following: 1. Segments A. Data Link Layer 2. Packets B. Network Layer 3. Frames C. Transport Layer
Responda
  • 1--->A; 2---->C; 3 --->B
  • 1--->C; 2---->A; 3 --->B
  • 1--->C; 2---->B; 3 --->A
  • 1--->A; 2---->B; 3 --->C

Questão 33

Questão
Which of the following statements are true regarding the command ip route 172.16.4.0 255.255.255.0 192.168.4.2? 1. The command is used to establish a static route. 2. The default administrative distance is used. 3. The command is used to configure the default route. 4. The subnet mask for the source address is 255.255.255.0.
Responda
  • 1 and 2
  • 2 and 4
  • 3 and 4
  • All of the above

Questão 34

Questão
If your routing table has a static, a RIP, and an IGRP route to the same network, which route will be used to route packets by default?
Responda
  • Any available route
  • RIP route
  • Static route
  • IGRP route
  • They will all load-balance.

Questão 35

Questão
A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?
Responda
  • IGRP has a faster update timer.
  • IGRP has a lower administrative distance.
  • RIP has a higher metric value for that route.
  • The IGRP route has fewer hops.

Questão 36

Questão
Start and stop bits are used in serial communication for
Responda
  • Error detection
  • Error correction
  • Synchronization
  • Slowing down the communication

Questão 37

Questão
How many Character per sec (7bits + 1parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 "Start" and 1 "stop" bit)?
Responda
  • 300
  • 240
  • 250
  • 24

Questão 38

Questão
The Network topology that supports bi-directional links between each possible node is
Responda
  • Ring
  • Star
  • Tree
  • Mesh

Questão 39

Questão
In a broad Sense, a railway track is an example of
Responda
  • Simplex
  • Half Duplex
  • Full Duplex
  • All of these

Questão 40

Questão
If one link fails, only that link is affected. All other links remain active. Which topology does this?
Responda
  • Mesh topology
  • Star topology
  • Bus topology
  • Physical topology

Questão 41

Questão
Which command would you place on interface connected to the Internet?
Responda
  • ip nat inside
  • ip nat outside
  • ip outside global
  • ip inside local

Questão 42

Questão
Which command would you place on interface on a private network?
Responda
  • ip nat inside
  • ip nat outside
  • ip outside global
  • ip inside local

Questão 43

Questão
What is the administrative distance of OSPF?
Responda
  • 90
  • 100
  • 110
  • 120

Questão 44

Questão
Which three commands can be used to check LAN connectivity problems on a router? (Select THREE )
Responda
  • show interfaces
  • show ip route
  • tracert
  • ping
  • dns lookups

Questão 45

Questão
You have an interface on a router with the IP address of 192.168.192.10/29. Including the router interface, how many hosts can have IP addresses on the LAN attached to the router interface?
Responda
  • 6
  • 8
  • 30
  • 32

Questão 46

Questão
What is the sub network number of a host with an IP address of 172.16.66.0/21?
Responda
  • 172.16.36.0
  • 172.16.48.0
  • 172.16.64.0
  • 172.16.0.0

Questão 47

Questão
The network address of 172.16.0.0/19 provides how many subnets and hosts?
Responda
  • 7 subnets, 30 hosts each
  • 8 subnets, 8,190 hosts each
  • 8 subnets, 2,046 hosts each
  • 7 subnets, 2,046 hosts each

Questão 48

Questão
On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?
Responda
  • /27
  • /28
  • /29
  • /30

Questão 49

Questão
When data is encapsulated, which is the correct order?
Responda
  • Data, frame, packet, segment, bit
  • Segment, data, packet, frame, bit
  • Data, segment, packet, frame, bit
  • Data, segment, frame, packet, bit

Questão 50

Questão
If you use either Telnet or FTP, which is the highest layer you are using to transmit data?
Responda
  • Application
  • Presentation
  • Session
  • Transport

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