1
The main function of the network layer is
Correct Answer
routing packets from the source to the destination
☑ MCQ PRACTICE
Computer Networks Unit 3
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Computer Networks MCQs - Unit 3
2
In store-and-forward packet switching, a router
Correct Answer
receives the whole packet before forwarding it
3
In a datagram network, each packet is
Correct Answer
routed independently
4
The shortest path routing algorithm commonly used is
Correct Answer
Dijkstra's algorithm
5
In flooding, a router sends each incoming packet
Correct Answer
on every outgoing line except the one it arrived on
6
A well-known problem of distance vector routing is
Correct Answer
the count-to-infinity problem
7
OSPF is an example of
Correct Answer
link state routing
8
Hierarchical routing is used to
Correct Answer
reduce the size of routing tables by dividing the network into regions
9
A common technique used in broadcast routing is
Correct Answer
reverse path forwarding
10
The leaky bucket algorithm
Correct Answer
smooths bursty traffic to a constant output rate
11
The token bucket algorithm
Correct Answer
allows bursts of traffic up to a limit
12
A choke packet is sent by a congested router to
Correct Answer
ask the source to slow down
13
Which of the following is a Quality of Service parameter?
Correct Answer
Jitter
14
An IPv4 address is
Correct Answer
32 bits long
15
An IPv6 address is
Correct Answer
128 bits long
16
The first-octet range of Class B IPv4 addresses is
Correct Answer
128 to 191
17
The default subnet mask for a /24 network is
Correct Answer
255.255.255.0
18
Which of the following is a private IPv4 address?
Correct Answer
192.168.1.10
19
NAT is used to
Correct Answer
translate private addresses to public addresses
20
ICMP is used for
Correct Answer
error reporting and diagnostics such as ping
21
ARP is used to map
Correct Answer
an IP address to a MAC address
22
DHCP is used to
Correct Answer
assign IP addresses to hosts dynamically
23
BGP is
Correct Answer
an exterior (inter-domain) routing protocol
24
A router operates at the
Correct Answer
network layer
25
Dividing a packet into smaller pieces to fit the maximum transfer unit (MTU) of a network is called
Correct Answer
fragmentation
Fill in the Blanks
26
The unit of data at the network layer is the ______.
Correct Answer
packet
27
The shortest path routing algorithm commonly used is ______'s algorithm.
Correct Answer
Dijkstra
28
In flooding, a router sends each packet on every outgoing line except the one it ______ on.
Correct Answer
arrived
29
Distance vector routing is based on the ______ algorithm.
Correct Answer
Bellman-Ford
30
A well-known problem of distance vector routing is the ______ problem.
Correct Answer
count-to-infinity
31
OSPF is a ______ state routing protocol.
Correct Answer
link
32
The leaky bucket algorithm outputs traffic at a ______ rate.
Correct Answer
constant
33
The token bucket algorithm allows ______ of traffic.
Correct Answer
bursts
34
An IPv4 address is ______ bits long.
Correct Answer
32
35
An IPv6 address is ______ bits long.
Correct Answer
128
36
ARP maps an IP address to a ______ address.
Correct Answer
MAC
37
NAT translates private addresses to ______ addresses.
Correct Answer
public
38
ICMP stands for Internet ______ Message Protocol.
Correct Answer
Control
39
DHCP stands for Dynamic Host ______ Protocol.
Correct Answer
Configuration
40
BGP stands for ______ Gateway Protocol.
Correct Answer
Border