Computer Networks - Dec 2014

Information Technology (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1(a) Explain collision detection procedure in CSMA/CD.(5 marks) 1(b) Consider a message 11010011101100, divisor 1011. Compute n bit binary CRC.(5 marks) 1(c) Compare circuit switched and packet switched network.(5 marks) 1(d) Differentiate between connection oriented and connectionless services.(5 marks) 2(a) What are the three main functions performed by network layer? What is routing. Explain distance vector counting.(10 marks) 2(b) What is IP address? Why it is required? What is subnet mark? Explain is subnetting and supernetting with explain.(10 marks) 3(a) Explain TCP congestion control.(10 marks) 3(b) Explain connection establishment and termination in TCP with neat diagram.(10 marks) 4(a) Explain HDLC protocol with suitable diagram.(10 marks) 4(b) Explain TCP sliding window with neat diagram in detail.(10 marks) 5(a) Explain TCP timer management and transaction TCP.(10 marks) 5(b) A IP header from an IP packet received at destination.
4500 003c 1c46 4000 4006 b1e6 ac10 0a63 ac10 0a0c. Map these values to IP header and explain all bits.(10 marks)

Write short note (any four):-

6(a) Network topology(5 marks) 6(b) GSM operation subsystem (OSS)(5 marks) 6(c) Link state routing(5 marks) 6(d) Framing at data link layers(5 marks) 6(e) Networking using Windows and LINUX operating system.(5 marks) 6(f) Static channel allocation of LAN & MAN.(5 marks)