What is the firewall ?

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1) What is the firewall ?


2) What is the meaning of the following terms in point of statefull firewall view:

• NEW traffic :
• ESTABLISHED traffic:
• RELATED traffic:

3) What is meaning of least privilege firewall?


4) if we have a two machine [client and server] , what are the following commands do if we run it on the machines, try to understand the options of the command [ client ip:10.242.21.140 ] :
• client$ nc –u –l 10006
• server$ nc –u 10.242.21.140 10006

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