Glossary of terms.

Position:Technology - Computer security - Brief Article
 
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Firewall--A device or application resource that controls access between private trusted networks and public untrusted networks (e.g. Internet), or between sub-networks within a private network (e.g. intranet). Firewalls track and control communications, deciding whether to pass, reject, encrypt or log communications, and ensure that these communications adhere to the defined security policy.

Content Filtering--Evaluating electronic communications, such as e-mail or Web pages, to identify contained key words or phrases, as well as viruses and vandals. User-defined criteria can be set to block or allow this content into the private network. Common usage of this technology is to defend against e-mail...

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