Module 5: Software Support

Cisco IOS Software

The ability to take advantage of the security services of Cisco IOS Software is another critical feature that you need to run a highly robust Cisco network. Security services enforce an organization’s policies and safeguard networks against misuse. The following list contains the key security services available through Cisco IOS Software:

		Access Control Lists - As the name implies, access control lists (ACLs) are commonly used as security filters to block traffic from entering or exiting parts of the network.
		Authentication, Authorization, and Accounting - Authentication validates a user's identity. Authorization limits what a user is allowed to do on the network, usually defined by a profile for the user or a group to which the user belongs.
		IP Security (IPSec) - A framework of open standards for ensuring secure private communications over IP networks.
		Cisco IOS Software Firewall - The Cisco IOS Software Firewall adds practical, state-of-the-art firewall technology to Cisco IOS Software-based routers. As an integrated solution, it takes advantage of what a customer already owns (a perimeter router) and understands (Cisco IOS Software), to simplify ownership and management considerations.

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