B.C.A. Examination, 2016
(Sixth Semester) / First Paper
(Computer Network Security)

1. (a) Discuss various kinds of attacks?
   (b) With a neat diagram, explain a model for network security?
2. (a) What are the requirements for message authentication?
   (b) Explain PGP? Why should some encrypt e-mail?
3. (a) Assume a client C want to communicate with a server S using Kerberos protocol, how can it be
   achieved?
   (b) Explain authentication header?
4. (a) What is SNMP? How does it work, explain?
   (b) Explain secure- Electronic transactions? Explain various Key requirements need for secure
   electronic transactions?
5. What is a firewall, explain the various types of firewall configurations with relevant diagram?
6. Explain followings :
   a) Intruders
   b) Viruses
   c) SNMPV3
7. (a) What are the properties a digital signature should have?
   (b) Explain classical Encryption techniques in detail?
8. Write short notes (any three) :
   (i) Public Key Crypto system
   (ii) S/Mime
   (iii) Configuration Management
   (iv) Secure Socket Layer
   (v) X.509