DATA COMMUNICATION AND COMPUTER NETWORK
QUESTION BANK
SHORT QUESTIONS
1. Define Data Communication.
2. Name the components of the data communication system.
3. Define jitter.
4. What is simplex, half duplex, full duplex?
5. If there is 15 nodes in mesh topology calculate the cable required?
6. What is SMTP.
7. What do you mean by protocol? Name any five protocols.
8. What do you mean by subnet masking?
9. What do you mean by classless and class-full IP address?
10. Define TCP and UDP.
11. List some of the transmission impairment.
12. Describe Nyquist theorm of SNR.
13. What is SNR? Discuss Shannon’s channel capacity?
14. Define bit rate and baud rate.
15. What do you mean by data encoding and decoding?
16. What is the role of parity bit in framing?
17. What are unicast, multicast and broadcast?
18. Define analog and digital signal.
19. What do you mean by data encoding and decoding?
20. What is X.25?
21. What do you mean by datagram.
22. List any two differences between MAC address and IP address.
23. What is the difference between LLC and MAC protocol?
24. Difference between bridge and switch.
25. List the working layer in OSI model for the following devices.
Router, bridge, hub, repeater, switch
26. Why TCP/IP?
27. Difference between internet, Internet, Intranet and Extranet.
28. Write the full form of following protocol and write at least one sentence related to
theirfunctionalities: DNS, DHCP, SMTP, ARP, HTTP, FTP, POP3, ICMP.
29. What is WWW?
30. What is the function of firewall?
LONG QUESTIONS
1. Describes the types of network architecture with diagram.
2. Discuss different modes of data communication.
3. Discuss the OSI layering architecture.
4. Explain TCP/IP layering model. Discuss how it differs from OSI layering model.
5. Discuss TCP/IP layering protocol architecture.
6. What do you mean by topology? Discuss different types of topology with diagram. List
theadvantages and disadvantages of all the topology.
7. What do you mean by IP address? Discuss different class of IP address.
8. How we can determine the host address and network address from a subnet mask?
Describewith an example?
9. What is the role of transmission media in data communication? Discuss category of
transmissionmedia used in data communication.
10. Discuss the working principle of Optical fiber.
11. Explain different encoding mechanism for digital to analog conversion.
12. Discuss different encoding mechanism for digital to digital conversion.
13. Discuss different encoding mechanism for analog to digital conversion.
14. Discuss different encoding mechanism for analog to analog conversion.
15. Differentiate between synchronous and asynchronous transmission.
16. What do you mean flow control and error control in data communication?
17. Differentiate between P2P and multipoint configuration.
18. Define multiplexing. Discuss different multiplexing scheme.
19. How TDM differs from FDM.
20. How packet switching differs from circuit switching?
21. What do you mean by congestion in data communication? How it can be controlled?
22. Explain the difference between virtual circuit and datagram.
23. Illustrate CSMA/CD protocol and analyse it’s importance..
24. . Explain about Ethernet
25. Explain about IPv4 address
