3 ec2352 – computer networks
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This document appears to be a study guide or exam for a Computer Networks course. It contains two parts: Part A with short answer questions about topics like datagram networks, framing, Ethernet, IP addressing, ARP, quality of service, variable bit rate, DNS, and public/private keys. Part B contains longer answer questions about guided transmission media, datagram vs virtual circuit networks with an OSI diagram, bit-oriented data link control protocol, types of Ethernet and Bluetooth, ICMP format and error reporting, routing algorithms, network characteristics like reliability and bandwidth, congestion control, and electronic mail message format and protocols. Students are to answer all the questions in the exam.
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- 1. www.vidyarthiplus.com www.vidyarthiplus.com Department of Electronics and Communication Engineering YEAR/SEMESTER : III/VI SUB CODE / NAME : EC2352 – COMPUTER NETWORKS PART-A(10 × 2 = 20) PART-A(10 × 2 = 20) (Answer all the Questions) 16. What are the features of datagram networks? 17. What do you mean by framing? 18. Why Ethernet is said to be a I – persistent protocol? 19. What is the purpose of Network Interface Card? 20. Compare IPv4 and IPv6 addressing. 21. Define ARP. 22. What is meant by quality of service? 23. Differentiate constant bit rate and variable bit rate. 24. What is meant by DNS? 25. How is a asymmetric key different from public key? PART – B (5 × 16 = 80) (Answer all the Questions) 26. a. i) Explain the principles of guided transmission media. (8) ii) Write a short notes on cable TV for Data transfer. (8) OR b. i) Briefly discuss about the Datagram networks and Virtual Circuit networtks. (4) ii) Explain the OSI reference model with neat diagram. (12) 27. a. Explain in detail about Bit oriented data link control protocol with neat diagrm. (16) OR b. i) Compare the different types of Ethernet in detail. (12) ii) Write a note on Bluetooth. (8) 28. a. Explain the ICMP message format and error reporting in detail. (16) OR b. Explain in detail about the different types of routing algorithms. (16) 29. a. Explain the following characteristics. (4 × 4 = 16) i) Reliability ii) Delay iii) Jitter iv) Bandwidth OR b. Explain in detail about Congestion control techniques in Transport layer. (16) 30. a. Describe the message format and the message transfer and the underlying protocol involved in the working of the electronic mail. (16) OR b. i) Explain the private key cryptosystem with an example. (8) ii) Explain the RSA algorithm with an example . (8)