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Chapter 6, Problem 5RQ
Program Plan Intro

Firewall:

A firewall is security software which imposes a set of protocols to prevent specific types of data from moving among trusted and untrusted level of networks.

Packet filtering firewall:

It is a network device from the types of firewall, which examines header of packets that transmits into a network and finds whether to drop it or forward it through next network based on its rules.

  • It has separate subsets such as static packet filtering, dynamic packet filtering and stateful packet inspection.

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