Anna Univ May/June Model Questions High Performance Computer Networks Question Paper June 2011-2013

M.E./M.Tech. DEGREE EXAMINATION, JUNE 2011. Common to M.E. – Applied Electronics/M.E. – Computer and Communication/ M.E.– Common System First Semester 250102 — HIGH PERFORMANCE COMPUTER NETWORKS (Regulation 2010) Time : Three hours Maximum : 100 marks Answer ALL questions. PART A — (10 ´ 2 = 20 marks) 1. What is the difference between UNI and NNI in ATM? 2. What is the principle behind Bellman Ford routing algorithm? 3. Enlist the features of Reservation Protocol (RSVP). 4. How does the soft-state feature of RSVP allow it to adapt to failures in the network. 5. State the principle of multiprotocol label switching (MPLS) operation. 6. What is meant by RED policy? 7. State Little's theorem. 8. What is the need for data traffic modelling? 9. Define the term Kerberos. How does it offer authentication service over a network? 10. List out any four MIB variables. Question Paper Code : 31019 PART B — (5 ´ 16 = 80 marks) 11. (a) (i) Explain the layered architecture of TCP/IP. Compare with OSI model. (10) (ii) Describe the signaling system #7 architecture which supports. ISDN network. (6) Or (b) (i) Write a brief note on variable length packet switches and Non-FIFO input queued switches. (8) (ii) What are the uses of DWDM in network configurations? (8) 12. (a) Discuss in detail about the various protocols available for real time interactive multimedia applications. (16) Or (b) (i) What are the different scheduling services defined in multimedia applications? Explain. (8) (ii) Discuss the interplay between a QOS routing algorithm, RSVP and integrated services IP. (8) 13. (a) (i) Describe the access method in VPN for remote users. (8) (ii) What are the security issues with respect to tunneling in point to point protocol? (8) Or (b) (i) Explain the difference between the leaky bucket traffic shaper and the token bucket traffic shaper. (8) (ii) In what way does the MPLS support for virtual private network (VPN)? (8) 14. (a) (i) Briefly explain the buffered communication system with arriving and departing packets. Give suitable examples. (10) (ii) Consider a data communication system with three transmission lines packets arrive at three different nodes with arrival rates 200 1 l = packets/sec, 300 2 l = packets/sec and 10 3 l = packets/sec respectively. Assume that an average of 50000 same size packets float in this system. Find the average delay/packets. (6) Or (b) (i) Mention the factors that make the Poisson model of data traffic a failure in network. (4) (ii) Describe the role of non Poisson model of data traffic in networks. (12) 15. (a) (i) Explain the reference architecture of SNMP for managing devices on IP network. (10) (ii) When is IP security appropriate? When is SSC/TLS appropriate? (6) Or (b) (i) What is NTA and mention the role of NTA in firewall? (6) (ii) Narrate the various types of firewalls and their features. (10)