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Question:
(a) Mention three limitations of a firewall.
(b) Compare packet-filtering and proxy-base firewalls. Give advantages and drawbacks of both.
(c) "Proxies effectively hide machines residing behind it from the Internet." Justify this statement.
(d) Which type of Intrusion Detection System (IDS) is only effective against known attack methods?
(e) Describe a Honeypot.
(f) Imagine you are the network manager of a company which uses a DMZ/firewall configuration to secure its connection to the Internet. You discover that an employee has attached a modem to his office phone line so that he can dial in to his desktop computer to get access to his files so he can work at home.
i. Is this a potential security risk for the company? Explain.
ii. What immediate action should you take in this situation?
iii. The employee has a legitimate need to work from home. How should you handle this?
Question: a) There are two basic approaches to dealing with errors in the presence of pipelining. One way is Go-Back-N and the other strategy is Selective Repeat. i. Explain
QUESTION (a) What do you meant by data spoliation? (b) Justify the following statement: "Disk imaging differs from creating a standard backup of disk." (c) Why do yo
Limitations of firewall Firewalls cannot protect a network if security rules are not followed properly by an organization or if the rules are not defined properly. Firewalls ar
QUESTION (a) Hashing and salting is commonly used as password storage techniques for most applications. Describe how hashing and salting enable secure storage of password (b
Information System Security 1. Write about: a. Potential Risks to Information Systems b. Factors to be addressed for making information systems more secure 2. Write about t
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Convert (111011)2 to ( )10
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(a) (i) If m = p·q·r where p, q, and r are prime numbers, what is Φ(m)? (ii) Therefore, Determine Φ(440). (b) Describe the following terms as used in cryptography: (i)
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