BAIT1103 Tutorial 1

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BAIT1103 Tutorial 1

  1. 1. BAIT1103 INTERNET SECURITY Tutorial 1 1. Explain the difference between computer security, network security and internet security by giving an example for each term. 2. What is the difference between the term threat and attack? Give one example for each term. 3. What is the difference between passive and active security threats? 4. List and briefly define categories of passive and active security attacks. Use diagrams to explain your answer. 5. Why are passive attacks difficult to detect and active attacks difficult to prevent. Past Year Questions: Q1. 7th August 2009: The well-known Twitter and Facebook websites suffered from a form of attack. Some of the users reported that the access to the websites became slower and degraded. After these attacks, Facebook was still working whereas Twitter remained offline for 2 hours. Source:http://www.bbc.co.uk/blogs/technology/2009/08/the_day_twitter_sto pped.htm (i) Name this type of attack. (2 marks) (ii) Is this attack a passive attack or an active attack? Support your answer with an explanation. (3 marks) (iii) This type of attack usually attacks on availability of the websites. From the perspective of security services, describe the term availability. (2 marks) Q2. Briefly describe the following terms and provide ONE (1) example each. (i) Security attack. (3 marks) (ii) Security service. (3 marks) (iii) Security mechanism. (3 marks) 1

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