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GATE 2021 : Computer Network Rapid Mini Mock (App update required to attempt this test)

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Question 1

In a network that has maximum packet size of 129 byte, a maximum packet lifetime of 30 second and a 8-bit packet sequence number, What is maximum rate per connection?

Question 2

Physical addressing is the functionality used at which of the following layer

Question 3

In the OSI model, what does the application layer do?

Question 4

How long does it take a packet of length 1,000 bytes to propagate over a link of distance 2,500 km, propagation speed 2.5 * 10⁸ m/s, and transmission rate 2 Mbps? Does this delay depend on packet length? Does this delay depend on transmission rate?

Question 5

Match the following Ip address with their functions.
List-I
A) 0.0.0.0/0
B) 0.0.0.0/32
C) 169.254.X.X/16
D) 224.X.X.X-239.X.X.X
List-II
I. Automatic Private IP addressing
II. Local host address
III. Multicasting IP address
IV. DHCP
V. Identities all networks and is reffered to as default route

Question 6

Determine the classof the classful IP address 32.46.7.3

Question 7

We have a network 210.50.60.0, we have to divide it into 6 equal subnets, give network and broadcast address of each subnet.

Question 8

An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address 131.23.151.76. The router’s routing table has the following entries:

The identifier of the output interface on which this packet will be forwarded is `______.

Question 9

What is routing table of E following network which uses Distance Vector Routing Algorithms (DVR) algorithm After one iteration.

Question 10

Station A uses 32 B packets to transmit the message to station B using a sliding window protocol the round trip delay is 80 ms and the bottleneck bandwidth on the path between A and B is 128 Kbps. Let X denotes the optimal window size that A should use. Also Y & Z be the no of bits which are used to represent the sequence no if the sliding window protocol is Go Back-N and Selective repeat, respectively. What will be the value of 2X+ 3Y- 4Z _______.

Question 11

The probability of a frame reaching safely is p. what is the mean number of transmission required to transmit 100 frames, when p=0.1?

Question 12

Consider the CSMA/CD protocol with data rate as 200 Mbps

If the length of the link is 2.5 km, find minimum frame size (in bytes). Assume signal propagation speed as

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GATE & PSU CS Computer Networks

Dec 26GATE & PSU CS