Principles of Information Security
Principles of Information Security
5th Edition
ISBN: 9781285448367
Author: Michael E. Whitman, Herbert J. Mattord
Publisher: Course Technology
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Chapter 6, Problem 9RQ
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.

  • An example of trusted network is “Organization’s Internet”. Similarly for untrusted network is “Internet”.
  • A list of firewalls that are commonly used as follows:
    • Application layer proxy firewalls
    • Hybrid firewalls
    • Packet filtering firewalls
    • Media access control layer firewalls

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