Total No. of Questions 10] [Total No. of Pages 01
B.Sc. DEGREE EXAMINATION, MAY 2018
Third Year
COMPUTER COMMUNICATIONS AND NETWORKS
Time 3 Hours Maximum Marks :70
Answer any five questions.
All questions carry equal marks.
Q1) Explain briefly about OSI Reference models in detail?
Q2) Discuss about guided transmission media?
Q3) Explain about Error detection and correction in detail?
Q4) What do you mean by URL and internet address? How is URL mapped to
internet address during a web access?
Q5) Explain why congestion occurs in packet switched network? How is congestion
controlled?
Q6) Write about transport layer briefly.
Q7) Write a short notes:
Sliding window protocol
Packet Routing
Q8) What is multiplexing? Explain various types of multiplexing?
Q9) What is IP datagram? Differentiate between IP datagram format and TCP
network format?
Q10) What is the difference between connection oriented and connection-less
services?