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Topic: Technology
Number of pages / Number of words: 10 / 2526
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Information coming in and leaving the network passes through the firewall where it can be "scanned" and determined if it is safe or not.

Firewalls use one or more of three methods to control traffic flowing in and out of the network:

? Packet filtering - Packets (small chunks of data) are analyzed against a set of filters...


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Packets that make it through the filters are sent to the requesting system and all others are discarded.

? Proxy service - Information from the Internet is retrieved by the firewall and then sent to the requesting system and vice versa.

? Stateful inspection - A newer method that doesn't examine the contents of each packet but instead compares certain key parts of the packet to a database of trusted information...


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