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Summary

ACLs are the most common and inexpensive method available for filtering traffic across the network. This chapter primarily focused on the use of ACLs for traffic filtering. An overview of IP addressing, subnets, and masks was also presented to help you better understand the implementation of ACL. A major part of this chapter was devoted to several types of ACLs and their applications. All Cisco IOS software versions are capable of supporting ACLs.

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