Network Security

A. In no less than 250 words, explain what is meant by an IDS and an IPS.  How are they different?  How are they connected to a network?  

List a few examples of IDS/IPS tools that are currently on the market.

B. Please answer below in a sentence each

1 List and briefly define three classes of intruders.

2 What are two common techniques used to protect a password file?

3 What are three benefits that can be provided by an intrusion detection system?

4 What is the difference between statistical anomaly detection and rule-based intrusion detection?

5 What metrics are useful for profile-based intrusion detection?

6 What is the difference between rule-based anomaly detection and rule-based penetration identification?

7 What is a honeypot?

8 What is a salt in the context of UNIX password management?

9 List and briefly define four techniques used to avoid guessable passwords.