Data Communication and Computer Networks – Previous Year Questions
241 questions from past UGC NET Paper 2 – Computer Science papers, each with the correct answer. Open any question for its explanation.
Topic-wise mock tests
- The solution to the silly window syndrome problem is/are: I. Nagle's algorithm II. Clark's algorithm III. Jacobson's algorithm IV. Piggybacking algorithm Choose the correct answer from the options given below:
- Match List I with List II. Choose the correct answer from the options given below:List I List II a. CDMA I. Provides mobile internet connection with faster data transfer rates b. GSM II. Allows users to connect to a net…
- Arrange the following in the order of OSI layers (bottom to top): I. Transforming the raw bits into frames for transmission II. Transmission of raw bits over the communication channel III. Handling user interfaces IV. C…
- A TCP server listens on port P on host S, and a client is connected to it. While the connection is active the server crashes and reboots. The client does not use the TCP keepalive timer. Which behaviour is possible? Sta…
- Find the number of addresses in each subnet.
- Find the subnet prefix.
- Find the first and last addresses of the first subnet.
- Find the subnet mask.
- Find the first and last addresses of the last subnet.
- Using the RSA algorithm, if p = 13, q = 5 and e = 7, the value of d and the cipher value of '6' with the (e, n) key are
- The transmission and propagation delays are respectively
- The minimum number of bits required in the sequence number field of the packet is
- The sender window size to get the maximum efficiency is
- If only 6 bits are reserved for the sequence number field, the efficiency of the system is
- The maximum achievable throughput (in Mbps) is
- Which mode is a block-cipher implementation acting as a self-synchronising stream cipher?
- Which one is a connectionless transport-layer protocol of the Internet protocol family?
- Consider an error-free 64 kbps satellite channel used to send 512-byte data frames in one direction, with very short acknowledgements coming back. What is the maximum throughput for a window size of 15?
- A classless address is given as 167.199.170.82/27. The number of addresses in the network is
- Which layer divides each message into packets at the source and reassembles them at the destination?
- Which of the following is correct for the destination address 4A:30:10:21:10:1A?
- Match List I with List II. Choose the correct answer from the options given below:List I List II A. DES I. Key size – 256 B. AES II. Key size – 1024 C. 3DES III. Key size – 56 D. RSA IV. Key size – 168
- Match List I with List II (Berkeley socket primitives). Choose the correct answer from the options given below:List I List II A. BIND I. Block the caller until a connection attempt arrives B. LISTEN II. Give a local add…
- Match List I with List II. Choose the correct answer from the options given below:List I List II A. Physical layer I. Routing of the signals, divide the outgoing message into packets, act as network controller for routi…
- Match List I with List II
- Match List I with List II
- Which of the following are controlled-access protocols A. Reservation B. Polling C. TDMA D. Token Passing E. CSMA/CA
- Which of the following is not the characteristics of packet switching?
- Which of the following are examples of data encoding schemes? A. Non-Return to Zero (NRZ) B. Manchester Encoding C. Amplitude Modulation D. Hamming code E. Bipolar AMI
- Which of the following are key features of Mobile Adhoc Networks (MANETs) A. Self - Organizing and decentralized. B. High Mobility of nodes. C. Requires fixed Infrastructure for operation. D. Network Topology is dynamic…