5105: BHARATHIDASAN ENGINEERING COLLEGE NATTARMPALLI UNIT I FUNDAMENTALS AND LINK LAYER PART A
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1 5105: BHARATHIDASAN ENGINEERING COLLEGE NATTARMPALLI NAME OF THE STAFF : R.ANBARASAN DESIGNATION & DEPARTMENT : AP/CSE SUBJECT CODE : CS 6551 SUBJECT NAME : COMPUTER NETWORKS UNIT I FUNDAMENTALS AND LINK LAYER PART A 1. What are the three criteria necessary for an effective and efficient network? 2. Group the OSI layers by function. - APR / MAY What are the features provided by layering? - APR / MAY What are the two interfaces provided by protocols? 5. What is LAN? 6. Distinguish between error control and flow Control. APR / MAY Define Error detection and correction. NOV/DEC What is the use of two dimensional parity in error detection? - NOV/DEC What are the issues in data link layer? 10. What are the ways to address the framing problem? 11. What are the responsibilities of data link layer? - NOV/DEC Mention the types of errors. 13. Define the following terms: IP, TCP and UDP. [ May / June 12 ] 14. What is redundancy? APR / MAY What is the purpose of hamming code? NOV/DEC What is OSI? Dec Define bit stuffing. - APR / MAY Define Layer. NOV/DEC What do you mean by framing. NOV/DEC State the issues of data link layer. NOV/DEC What is refraction? April / May List the difference between circuit switching and packet networking.
2 PART B 1. Draw the OSI network architecture and explain the functionalities of every layer in detail. Nov./ Dec.11,15 2. Discuss various topologies of the network with suitable diagrams. Nov./ Dec Explain the categories of networks. 4. What is the need for error detection? Explain with typical examples.explain methods used for error detection and error correction. APR / MAY 2015 Nov./Dec Explain error control mechanism. 6. Explain the various flow control mechanism. Nov./ Dec Discuss in detail about internet architecture. APR / MAY Explain the following: (i) PPP (ii) HDLC (iii) SONET. April / May Enumerate the Go back N ARQ with a neat sketch. APR / MAY Illustrate the sliding window mechanism with an example. Nov./ Dec Explain in detail about the stop-and-wait ARQ in the following cases: (i) Damaged frames (ii) Lost data frames and (iii) Lost ACK. 12. Discuss in detail about the network performance.
3 UNIT II MEDIA ACCESS AND INTERNETWORKING PART A 1. What are the responsibilities of Network Layer? 2. What is DHCP? 3. Define ICMP? 4. What is the need of internetwork? 5. What are the types of class full addressing? 6. What do you mean by ARP? 7. How does a router differ from a bridge? APR / MAY What are the functions of MAC? 9. Define the term medium access control mechanism 10. What is bridge? Nov. / Dec What is a repeater? 12. Define router and source routing. Nov. / Dec What is a switch? Nov. / Dec What is mean by Fast Ethernet and Gigabit Ethernet? Nov. / Dec How do you define CSMA / CD? Nov. / Dec What is meant by exponential back off? Nov. / Dec What is scatternet? Nov. / Dec List the main limitation of bridges. 19. What do you understand by CSMA protocol? April / May List the functions of bridges. April / May 15
4 PART B 1. Explain in detail about the access method and frame format used in Ethernet and token ring. April / May Explain in detail about IEEE with suitable diagram. 3. Explain detail about Bluetooth 4. Explain about IPv4 address 5. Explain about Address resolution protocol 6. Explain about RARP 7. Explain about Internet Control Message Protocol. 8. (i) Discuss the MAC layer functions of IEEE April / May 15 (ii) Briefly define key requirements of wireless LAN. April / May (i) An IEEE token ring has 5 stations and a total wire length of 230m. How many bits of delay must the monitor insert into the ring? Calculate this for both 4 Mbps and 16 Mbps rings. The propagation speed may be assumed to be 2.3 x 10 8 m/s. (ii) Discuss the problems encountered in applying CSMA / CD algorithm to wireless LANs. How does specification solve these problems? May / June 12, Explain the physical properties of Ethernet with necessary diagram of Ethernet transceiver and adapter. Nov. / Dec With a neat sketch explain about IP service model, packet format, Fragmentation and reassembly. Nov. / Dec. 16
5 UNIT III ROUTING PART A 1. What is routing? 2. What is the purpose of address resolution protocol (ARP)? Nov / Dec13 3. Define an internetwork 4. State the duties of network layer 5. What is multicasting? Nov / Dec11 6. What are different types of multicast routing? 7. Define subnetting. Nov / Dec11, Mention any four applications of multicasting. 9. Describe the process of routing packets. 10. What are the some routing algorithm types? 11. What is a benefit of DHCP? Nov / Dec What are the services offered by network layer? 13. What are data grams? 13. What is IP addressing? 14. How can the routing be classified? 15. What are the salient features of IPv6? Nov / Dec What is multicast? What is the motivation for developing multicast? April / May Define VCI. Nov / Dec What is fragmentation and reassembly? Nov / Dec16
6 PART B 1. Explain IP addressing method. 2. Explain the distance vector routing and link state routing algorithm. Mention the limitations of the same. April / May Define bridge and explain the type of bridges. 4. Explain subnetting. 5. Write short notes about repeaters, routers and gateways. Repeaters 6. Explain detail about Global internet. 7. Explain multicast routing. 8. Explain the shortest path algorithm with suitable illustrations. April / May 15, Nov/ Dec Discuss in detail about any two multicast routing with neat sketches. Nov/ Dec.16
7 UNIT IV TRANSPORT LAYER PART A 1. What are the fields on which the UDP checksum is calculated? Why? 2. What are the advantages of using UDP over TCP? 2. What is TCP? 3. Define congestion. April / May List the flag used in TCP header? 5. Give the approaches to improve the QOS.. 6. What do you mean by QOS? 7. What is multiplexing? 8. What is the demultiplexing? 9. What is RTT? 10. What is the segment? 11. What is a port? 12. List the services of end to end services. 13. What is congestion? Nov. / Dec What are the functions of transport layer? 15. What are the types of QOS tools? 16. List some ways to deal with congestion 17. Define a network congestion? Nov. / Dec Explain the three types of addresses in TCP/IP? 19. What are the flow characteristics related to QOS? 20. What are the techniques to improve QOS? 21. Define Socket address 22. What are the two types of protocols used in Transport layer? 23. Define Throughput. April / May Define UDP. Nov. / Dec What is the need of port numbers? 26. What are the types of port numbers used in transport layer? 27. Why TCP services are called Stream delivery services? 28. Define jitter. 29. Compare connectionless service & connection oriented service. Nov. / Dec What is Unicast & Multicast communication?
8 PART B 1. Explain the various fields of the TCP header and the working of the TCP protocol. April / May 15, Nov. / Dec Explain the three way handshake protocol to establish the transport level connection. April / May List the various congestion control mechanisms. Explain any one in detail. April / May How is congestion controlled? Explain in detail about congestion control techniques in transport layer. Nov. / Dec Write detailed note on : (i) RPC (ii) RTP Nov. / Dec Explain in detail about the simple demultiplexing and reliable byte streams. April / May Describe how reliable and ordered delivery is achieved through the TCP. Nov. / Dec Why does TCP uses and adaptive retransmission and describe its mechanism. Nov. / Dec Illustrate and explain UDP and its packet format. Nov. / Dec Explain in detail about TCP congestion avoidance algorithm. Nov. / Dec Give and explain the TCP header format. Nov. / Dec With the help of neat network diagram, Explain how TCP messages a byte stream. Give an example. Nov. / Dec 12
9 UNIT V APPLICATION LAYER PART A 1. What is DNS? 2. Define SMTP? Nov. / Dec What is mean by Telnet? 4. State the purpose of SNMP. Nov. / Dec Why security is necessary? 6. What is domain name system responsible for? 7. What is a virtual terminal? 8. What are the basic functions of ? 9. Define WWW. 10. What is web browser? 11. What is URL? 12. What is POP? 13. What are the transmission modes of FTP? 14. Mention the application of FTP. 15. Differentiate application program and application protocol. Nov. / Dec Distinguish between SMTP and MIME. 17. Compare HTTP and FTP. 18. What are the advantages of DNS? 19. What are the four services required for secured communication? 20. What is the purpose of firewall? 21. What is meant by cryptography? 22. What is the basic model FTP? 23. Give the format of HTTP request. Nov. / Dec List the functions of POP3. Nov. / Dec What is the role of VCI? April / May 16
10 PART B 1. Explain about e mail system with neat sketch. April / May 11, Nov. / Dec. 11,13,14 2. With neat diagram, discuss about SNMP. Nov. / Dec Explain in detail about MIME with suitable diagram. 4. Give the comparisons between POP3 and IMAP4. Nov. / Dec Discuss in detail about the HTTP and RTP with neat sketches. 6. Briefly discuss about TCP connections in HTTP. 7. Give a detailed notes on domain name system (DNS) with a neat diagram. Nov. / Dec. 11,16. Explain in detail about the DNS hierarchical tree structure with neat sketch. 9. Explain in detail about the Web services with neat diagrams. 10. Discuss in detail about the SOAP architecture with neat sketch. 11. Compare and contrast REST / HTTP vs. WSDL / SOAP. 12. Explain the final delivery of to the end user using POP3. April / May Explain the message transfer using SMTP. April / May 15, Nov. / Dec Write a detailed note on web services. April / May Discuss about WWW ( HTTP) in detail. April / May 11, Nov. / Dec. 12
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