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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
M.C.A. DEGREE EXAMINATION COMPUTER APPLICATIONS
FIFTH SEMESTER NOVEMBER 2017
CA 5810 NETWORK SECURITY
Date: 08-11-2017 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART-A
Answer ALL the questions 10 x 2=20
How do IETF and ITU-T publish their recommendations?
What is non-repudiation?
Mention the different ways of making revenue out of finding vulnerabilities.
What is smurf attack?
Name the approaches to attacking conventional encryption scheme.
What is unconditional and computational security?
Compare and contrast Hash and MAC.
What is Kerberos?
Name the types of firewalls.
10) Mention the three subsets of packet filtering firewalls.
PART B
Answer ALL the questions 5 x 8=40
11) Explain specific and pervasive mechanisms.

Give explanation on security attacks.
12) Explain Vulnerability.

Give a brief description on security threats.
13) Describe Caesar cipher.

Describe the types of cryptanalytic attacks.
14) Explain PKIX model with a diagram.

Elucidate SHA-512 with a neat diagram.
15) Explain ESP and AH protocols.

Describe Oakley and ISAKMP.
PART- C
Answer ANY TWO questions 2 x 20 40
16) Give explanation on X.800 security services.(10)
Describe reconnaissance attacks.
17) Explain the following:
Playfair cipher.(10)
Authentication applications.
18) Elucidate the following:
DES.(10)
IPSec logical architecture.