Analyzing Computer Security: A Threat Vulnerability Countermeasure Approach by Charles P. Pfleeger & Shari Lawrence Pfleeger

Analyzing Computer Security: A Threat Vulnerability Countermeasure Approach by Charles P. Pfleeger & Shari Lawrence Pfleeger

Author:Charles P. Pfleeger & Shari Lawrence Pfleeger [Pfleeger, Charles P.]
Language: eng
Format: azw3
Publisher: Pearson Education
Published: 2011-08-17T16:00:00+00:00


Reconfiguring the architecture of a network limits or complicates movement, but it does not address the central security goal of controlled access. To accomplish that we depend on a device called a firewall, which we describe next.

Countermeasure: Firewall

Firewalls in buildings, as their name implies, are walls intended to inhibit the spread of fire from one part of a building to another. Firewalls are built of materials that withstand fires of a particular intensity or duration; they deter fire spread but are not guaranteed or intended to stop a particularly intense fire. As computer security devices, network firewalls are similar, protecting one subnet from harm from another subnet. They are intended to block many sources of damage and to deter others.



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