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CCNP 1: Advanced IP Addressing Management

Chapter Description

This guide from Cisco Press explains the ins and outs of IP management, including how to resolve IP addressing crises, and how and when to use helper addresses.


This chapter described how all of the following can enable more efficient use of IP addresses:

  • Subnet masks

  • VLSMs

  • Private addressing

  • NAT

This chapter also showed that hierarchical addressing allows for efficient allocation of addresses and a reduced number of routing table entries. VLSMs, specifically, provide the capability to include more than one subnet mask within a network and the capability to subnet an already subnetted network address. Proper IP addressing is required to ensure the most efficient network operations. Finally, the IPv6 addressing format was presented.

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