DATA COMMUNICATION & COMPUTER NETWORKS, MCA Question Paper

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Roll No...........................

Total No. of Questions : 13]                                                         [Total No. of Pages : 03

Paper ID [A0508]

(Please fill this Paper ID in OMR Sheet)

MCA (203) (S05/Old) (Sem. - 2nd)

DATA COMMUNICATION & COMPUTER NETWORKS

Time : 03 Hours                                                                              Maximum Marks : 75

Instruction to Candidates:

1) Section - A is Compulsory.

2) Attempt any Nine questions from Section - B.

Section - A

Q1)                                                                                                    (15 × 2 = 30)

a) What are the different types of errors encountered in data/computer communications?

b) Differentiate between pure Aloha and slotted Aloha.

c) What are important characteristics of STDM?

d) How leaky bucket algorithm is different from token bucket algorithm?

e) List the major design issues at transport layer level.

f) Why network standardization is too important in today’s world?

g) How fourier analysis is important in data communication?

h) Differentiate between STP & UTP Cable media.

i) What do you understand by the term network software?

j) List the salient features of IEEE 802 for LAN.

k) What are the advantages and disadvantages of flooding?

l) Show the relationship between IP, Port & Socket addresses?

m) What is the need of congestion control in networks?

n) List the main features of message switching.

o) How router is different from switch?

Section - B

(9 × 5 = 45)

Q2) What is meant by terms addressing and naming in computer Networks.

Q3) What are the IP addresses used or spanned by the CIDR address192.168.10.0/20?

Q4) Differentiate between guided media and unguided media.

Q5) Consider a point-to-point link 50 km in length. At what bandwidth would propagation delay (at a speed of 2x10∗8m/s) equal transmit delay for 100- byte packet? What about 512 byte packet?

Q6) Discuss the architecture of TCP/IP Model.

Q7) Explain the working of cable modems.

Q8) What is the hamming distance for the following codes

(a) d(10000,01000)

(b) d(0000,0000)

(c) d(10000,01000)

(d) d(0000,0000)

Q9) A router has the following routes in its routing table Route Outgoing Interface

0.0.0.0/0 e1

10.0.0.0/8 e0

10.0.0.0/16 e1

10.0.1.0/24 s0

10.1.1.0/24 s1

10.1.0.0/16 s0

10.1.0.0/24 e1

10.1.1.1/32 s2

A packet arrives at the router with a destination address of 10.1.1.1. Which interface will the router use to transmit that packet? Justify your answer.

Q10) Write a short note on Optical Fiber Communication.

Q11) Discuss the working of distance vector routing algorithm.

Q12) Explain the working of leaky bucket algorithm with the help of suitable example.

Q13) Write a short note on flow control and buffering.