HI6043 Computer Network Security Semester 2 2023

HI6043 Computer Network Security Semester 2 2023

Sample Paper

VALUE:50%

INSTRUCTIONS TO CANDIDATES:

This is online exam. There are total five (05) questions in the exam. Each question is worth 10 marks. There are total 50 marks for the exam.

You MUST pass the final exam (i.e. obtain at least 50% marks or more) to pass the subject.

Note: There are total FIVE (05) questions. Each question has 10 marks and there are total 50 marks for the exam. Attempt all questions and answers should contain your own understanding, thinking, evaluation and analyses.

Question 1.

What is the purpose of a firewall in network security, and how does it work? Provide examples of how firewalls can be configured to enhance network security.

Question 2.

Explain the concept of encryption in the context of network security. Discuss the differences between symmetric and asymmetric encryption algorithms and their respective use cases.

Question 3.

What is a Distributed Denial of Service (DDoS) attack, and how can organizations defend against such attacks? Describe at least three common DDoS mitigation techniques.

Question 4.

Discuss the importance of strong authentication and access control mechanisms in network security. Compare and contrast single-factor authentication (SFA) with multi-factor authentication (MFA), and provide examples of their applications.

Question 5.

Describe the concept of intrusion detection systems (IDS) and intrusion prevention systems (IPS) in network security. Explain their roles in detecting and mitigating network threats, and provide examples of the types of threats they can help prevent.

END OF EXAMINATION