1. Summarize four potential types of harm to network communications.
2. Summarize the strengths of WPA over WEP.

 

13. TCP is a robust protocol: Sequencing and error correction are ensured, but there

is a penalty in overhead (for example, if no resequencing or error correction is

needed). UDP does not provide these services but is correspondingly simpler. Cite

specific situations in which the lightweight UDP protocol could be acceptable, that is,

when error correction or sequencing is not needed.

17. A port scanner is a tool useful to an attacker to identify possible vulnerabilities in

a potential victim's system. Cite a situation in which someone who is not an attacker

could use a port scanner for a nonmalicious purpose.

19. Compare copper wire, microwave, optical fiber, infrared, and (radio frequency)

wireless in their resistance to passive and active wiretapping.

26. Syn flood is the result of some incomplete protocol exchange: The client initiates

an exchange but does not complete it. Unfortunately, these situations can also occur

normally. Describe a benign situation that could cause a protocol exchange to be

incomplete.

27. A distributed denial-of-service attack requires zombies running on numerous

machines to perform part of the attack simultaneously. If you were a system

administrator looking for zombies on your network, what would you look for?

 

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