Cisco Network Admission Control, Volume II

When most information security professionals think about threats to their networks, they think about the threat of attackers from the outside. However, in recent years the number of computer security incidents occurring from trusted users within a company has equaled those occurring from external threats. The difference is, external threats are fairly well understood and almost all companies utilize tools and technology to protect against those threats. In contrast, the threats from internal trusted employees or partners are often overlooked and much more difficult to protect against.
Network Admission Control (NAC) is designed to prohibit or restrict access to the secured internal network from devices with a diminished security posture until they are patched or updated to meet the minimum corporate security requirements. A fundamental component of the Cisco® Self-Defending Network Initiative, NAC enables you to enforce host patch policies and to regulate network access permissions for noncompliant, vulnerable systems.


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