Network Security
This course covers the fundamental concepts of network security protocols, wireless security concepts, basics of security in cloud and IoT.
Tribhuvan University
Institute of Science and Technology
Ns Model Qn
Bachelor Level / elective-iii-semester / Science
Computer Science and Information Technology( CSC416 )
Network Security
Full Marks: 60 + 20 + 20
Pass Marks: 24 + 8 + 8
Time: 3 Hours
Candidates are required to give their answers in their own words as far as practicable.
The figures in the margin indicate full marks.
SECTION A
Attempt any TWO question.
What is security association in IPSEC? Describe how Encapsulating security payload protocol provides confidentiality and authentication in IPSEC.
Differentiate TLS session from TLS connection. How TLS Record Protocol guarantees confidentiality and message integrity? Discuss its operations.
Discuss the security threats that might occur in wireless networks. Describe the IEEE 802.11i phases of operation.
SECTION B
Attempt any EIGHT question.
What is network security? How it differs from computer and information security?
How remote user authentication is done using symmetric encryption?
What is port forwarding? How SSH provides local forwarding and remote forwarding?
How device security, client/server traffic security, and barrier security sets mobile device security strategy?
What is DNS Security Extensions (DNSSEC)? How DNSSEC is designed to protect DNS clients from accepting forged or altered DNS resource records?
Describe the four principal services provided by S/MIME.
What is intrusion? Discuss different approaches of intrusion detection.
What is the difference between transport mode and tunnel mode in IPSEC?
Describe the services provided by a service provider under cloud security as a service.