RTU 2015 Question Paper Semester VIII Computer Science and Engineering Computer Networks

RollNo. Total No of Pages: tr € BE4O88 € () B. Tech. VIII Sern. (Main/Back) Exam., April, 2015 $ Electronics & Communication Engineering H o 88C1. ComPuter Networks Time: 3 Hours Maximum Marks: 80 Min. Passing Marks: 24 Instructions to C andidat e s : Attempt any five questi,ons, selecting one question from each unit. All questions carry-equal mnrks. Schematic diagrams must be shown wherever necessary. Any data you feel missing suitably be assumed and stated clearly. Units of quantities used/calculated must be stated clearly. , Use of following supporting material is permitted dwring examination. 1. NIL 2.NIL UNIT - I Q.l Define birth and death process. Obtain its steady state probabilities. How it could be used to find the steady state soluiion for the M/M/l model? t16l OR Q.l (a) Explain how queuing theory could be used to study computer networks. tSl (b) Find the steady state solution for the multiserver MAVI/C model and hence find Lg, Wg, W, and L, by using Little formula. t8l UNIT - II Q.2 (a) What is the difference between Internet architecture and OSI architecture? I8l (b) Write short note on effor detection and correction? Show how the following data 0001111111001111101000 would change when bit stuffing is applied on it. t8l [8E4088] Page L ofZ [e7ool

OR Q.2 (a) What are the responsibilities of data link layer? Explain the different approaches of framing. u2l (b) Discuss simplex stop and wait protocol. t4) UNIT - III Q.3 Describe the FDDI frame format and explain. Write the advantages of FDDI over a basic taken ring. t16l OR Q.3 (a) Name the four basic network topologies and explain them giving all the relevant features. t8l (b) Explain the working of ALOHA and SLOTTED ALOHA. t8l UNIT - IV Q.4 (a) Explain the TCP transmission policy, congestion control. t8l (b) Explain the building and distribution of link.state packets in link state routing algorithms. t8l OR Q.4 (a) Explain a congestion control algorithm for TCp/Ip networks. t8l (b) Explain OSPF with suitable illustration. t6l (c) Why is adaptive routing superior to non adaptive routing? tzl e.5 Diagrammatically ilrustrate "ro .ffi, architecture. t16l OR Q.5 (a) What is the need for frame relay? How does it differ from conventional packet switching? What are the functions of its layers? Igl (b) How does ATM achieve high speed switching? And how congestion is controlled in ATM networks? t8l [8E4088] Page? ofZ [e70ol