UGC NET · PAPER 2
UGC NET Paper 2 Computer Science – Unit 9: Data Communication and Computer Networks PYQ (June 2024 (Cancelled Exam))
Q8. Match List I (line-coding scheme) with List II (average bandwidth)
| List I | List II |
|---|---|
| A. NRZ-L | I. B = N/4 |
| B. 2B1Q | II. B = N/8 |
| C. 4D-PAM5 | III. B = N/3 |
| D. MLT-3 | IV. B = N/2 |
- A-II, B-I, C-IV, D-III
- A-IV, B-II, C-I, D-III
- A-IV, B-I, C-II, D-III
- A-III, B-IV, C-II, D-I
Q29. Which of the following are types of interface in an ATM network?
A. User-to-user
B. User-to-network
C. Network-to-network
D. Host-to-network
E. User-to-host
Choose the correct answer from the options given below:
A. User-to-user
B. User-to-network
C. Network-to-network
D. Host-to-network
E. User-to-host
Choose the correct answer from the options given below:
- A and B Only
- B and C Only
- C and D Only
- D and E Only
Q37. An IPv4 packet has arrived with the first few hexadecimal digits shown below. How many hops can this packet travel before being dropped, and to which upper-layer protocol does the data belong?
(54000018 00100110 040601…)₁₆
(54000018 00100110 040601…)₁₆
- 01 hops, TCP
- 02 hops, UDP
- 03 hops, ICMP
- 4 hops, TCP
Q39. Match List I with List II
| List I | List II |
|---|---|
| A. Channelization protocol | I. ALOHA |
| B. Bit-oriented protocol | II. TDMA |
| C. Random-access protocol | III. Reservation |
| D. Controlled-access protocol | IV. HDLC |
- A-I, B-III, C-IV, D-II
- A-II, B-IV, C-I, D-III
- A-IV, B-III, C-II, D-I
- A-III, B-IV, C-I, D-II
Q40. What is the total delay (latency) for a frame of 10 million bits sent on a link with 20 routers, each having a queuing time of 2 μs and a processing time of 1 μs? The link is 5000 km long, the speed of light in the link is 2 × 10⁸ m/s and the bandwidth is 6 Mbps.
- 0.624050 s
- 1.691726 s
- 2.425080 s
- 1.714030 s
Q44. Services provided by the Point-to-Point Protocol (PPP):
A. Frame format
B. Establishment of the link
C. Flow control
D. Sequence numbering
E. Authentication
Choose the correct answer from the options given below:
A. Frame format
B. Establishment of the link
C. Flow control
D. Sequence numbering
E. Authentication
Choose the correct answer from the options given below:
- A, B and E Only
- A, C and D Only
- C, D and B Only
- B, C and D Only
Q58. What is the order of the following fields in a Frame Relay frame format?
A. Flag
B. FCS
C. Address
D. Information
Choose the correct answer from the options given below:
A. Flag
B. FCS
C. Address
D. Information
Choose the correct answer from the options given below:
- A, C, D, B
- D, A, C, D
- C, B, A, D
- A, B, D, C
Q60. The sequence of fields in an IP datagram header will be:
A. Flags
B. Options
C. Protocol
D. Identification
E. Service type
Choose the correct answer from the options given below:
A. Flags
B. Options
C. Protocol
D. Identification
E. Service type
Choose the correct answer from the options given below:
- E, D, A, C, B
- D, A, B, C, E
- D, E, C, B, A
- E, C, D, A, B
Q62. IP is responsible for ______ communication while TCP is responsible for ______ communication.
- Node-to-node, Host-to-host
- Process-to-process, Host-to-host
- Socket-to-socket, Host-to-node
- Host-to-host, Process-to-process
Q81. According to the Nyquist theorem, to reproduce the original analog signal, a necessary condition is that:
- The sampling rate must be at least 2 times the highest frequency contained in the signal
- The sampling rate must be at least 2 times the lowest frequency contained in the signal
- The sampling rate must be at least ½ times the highest frequency contained in the signal
- The sampling rate must be at least ½ times the lowest frequency contained in the signal