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SIXTH SEMESTER B.A/B.Sc. DEGREE EXAMINATION, MARCH 2020
(CUCBCSS—UG)

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Computer Science
BCS 6B 13—COMPUTER NETWORKS
(2017 Admissions)

Time : Three Hours Maximum : 80 Marks
Part A
Answer all questions.
Each question carries 1 mark.
1. What is intranet ?
2. How many layers are there in TCP/IP reference model ?
3. Expand IEEE.
4. Whatis LRC?
5. What NAT stands for ?
6. How many bits are used in IPv6 addressing scheme ?
7. Whatis SCTP?
8. What is the use of FTP ?
9. What is hash function ?

. What do you mean by DES ?

ಕ (10 x 1 = 10 marks).
Part B 1
Answer all questions.
Each question carries 3 marks.
What are the different categories of networks ? Explain each one.
Explain the differences between 3G and 4G mobile networks. `
What is Router? Explain its function.
Explain the functions of DNS.

Distinguish between symmetric and asymmetric encryption scheme.
(5 x 3 = 15 marks)

Turn over