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# BARC 2020: Computer Networks Nuclear Quiz 1 (App update required to attempt this test)

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Question 1

Router with three interfaces connects 3 subnets in a 222.222.222.0 network. Their subnet mask’s are given. Match the following IP’s and Interfaces they belong to? List-I
A) A
B) B
C) C
List-II
1)222.222.222.192, 222.222.222.193
2)222.222.222.240, 222.222.222.241
3)222.222.222.193, 222.222.222.194

Question 2

Find the latency of Token Ring (in bits) where data rate of link is 20 Mbps and 40 stations separated by 100 meters and bit delay at each station is 1 bit. (Assume propagation speed as )

Question 3

Assume 10 Mbps Ethernet and two stations A and B on it’s same segment. The RTT between two nodes is 650 bit times. A and B start transmitting frame and collision occurs and both sends 30-bit jam signal. Find the time at which both nodes A and B sense an idle channel (in )

Question 4

Which of the following statement is TRUE?

Question 5

In a RSA cryptosystem a particular A uses two prime numbers p = 11 and q =17 to generate her public and private keys. If the public key of A is 11. Then the private key of A is ____________.

Question 6

During message transfer between two computer system present in a network connected with n numbers of routers, which is variable?

Question 7

Hamming code is a set of error-correction codes that can be used to detect and correct the errors that can occur when the data is moved or stored from the sender to the receiver. Let m be the data bit that we need to send and r be the number of redundant bit, that we added along with the data to detect and correct the error. The formula to calculate the number of redundant bit is:

Question 8

The message 111010 is to be transmitted using the CRC polynomial to protect it from errors. What will be the CRC generated ?

Question 9

You have a class B network with 12 bit subnet How many subnets and how many hosts per subnet are available ?

Question 10

Throughput of network is dependent on –
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