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.
- Match List I with List II. List I: A. IMAP, B. ARP, C. POP, D. TELNET. List II: I. A protocol that allows email clients to retrieve emails from a mail server; II. Used for remote login to another computer over a network…
- The primary function of firewall in network security is
- Match the LIST-I with LIST-II C. Internet of III. Contracts that Things specify performance standards and services availability. A method allowing multiple Platform as a D. IV. operating service system to run on a singl…
- Match List - I with List - II.
- Host A (on TCP/IPv4 Networks) send an IP Datagram D to host B (also on TCP/IPv4 network). Assume that no error occured during transmission of D, when D reaches B. Which of following header field may differ from that of…
- Match List - I with List - II.
- Match List - I with List - II.
- Arrange the following steps in a proper sequence for the typical process of a DNS query : (A) Query authoritative DNS Server (B) Query local DNS Server (C) Local DNS Server Check Cache (D) Query root DNS Server (E) Quer…
- Consider the three way hand shaking process followed during TCP connection establishment between two hosts A and B . Let S and R be two random 32 -bit starting sequence numbers chosen by A and B, respectively. Suppose A…
- Two computers A and B are configured as follows : A has IP address 203.197.2.53 and subnet mask 255.255.128.0, B has IP address 203.197.75.201 and subnet mask 255.255.192.0. What one of the following statement is true?
- Match List I (line coding scheme) with List II (average bandwidth, N = data rate). List I: A. NRZ-L, B. 2B1Q, C. 4D-PAM5, D. MLT-3. List II: I. B = N/4, II. B = N/8, III. B = N/3, IV. B = N/2.
- Which of the following is the Markup language? A. HTML B. XML C. DHTML D. LML E. PML
- An IPv4 packet has arrived with the first few hexadecimal digits as shown below. How many hops can this packet travel before being dropped? The data belong to what upper-layer protocol? ( 5400001800100110040601...) 16
- Match List I with List II. List I: A. Channelization protocol, B. Bit-oriented protocol, C. Random-access protocol, D. Controlled-access protocol. List II: I. ALOHA, II. TDMA, III. Reservation, IV. HDLC.
- What is the total delay (latency) for a frame size of 10 million bits that is being set up on a link with 20 routers, each having a queuing time of 2 μ μs s and a processing time of 1 ? The length of link 5000 km. The s…
- Services provided by point-to-point protocol (PPP): A. frame format B. establishment of the link C. flow control D. sequence numbering E. authentication
- According to the Nyquist theorem to produce the original analog signal, one necessary condition is :
- Which of the following is not a field in TCP header?
- Which of the following are examples of CSMA channel sensing methods? (A) 1-persistent (B) 2-persistent (C) p-persistent (D) o-persistent
- The work done by UDP is/are : (A) Congestion control (B) Flow control (C) Retransmission (D) Segment transmission
- Match List - I with List - II.
- Given below are two statements: Statement (I) : In datagram networks - routers hold state information about connections Statement (II) : In a virtual circuit network- each virtual circuit requires router table space per…
- A TCP server application is programmed to listen on port P on host S . A TCP client is connected to the TCP server over the network, Consider that while TCP connection is active the server is crashed and rebooted. Assum…
- Match List I with List II
- Match List I with List II
- Consider two hosts P and Q that are connected through a router R. The maximum transfer unit (MTU) value of the link between P and R is 1500 bytes and between R and Q is 820 bytes. A TCP segment of size 1400 bytes is tra…
- What is the protocol of the payload being carried by the packet?
- What is the size of datagram?
- Which protocol is used to acquire the MAC Address of a host whose IP address is known?
- In CRC coding if the data word is 111111 , divisor is 1010 and the remainder is 110 . Which of the following code is true?