N
NAK

Negative acknowledgment: A response sent from a receiver, telling the sender that the information was not received or contained errors. Compare with: acknowledgment.

named access list

Used in both standard and extended lists to help with administration of access lists by allowing you to name the lists instead of using numbers. This also allows you to change a single line of an access list, which isn't possible in regular, numbered access lists.

NAT

Network Address Translation: An algorithm instrumental in minimizing the requirement for globally unique IP addresses, permitting an organization whose addresses are not all globally unique to connect to the Internet nevertheless by translating those addresses into globally routable address ...

Get Cisco® Network Professional's: Advanced Internetworking Guide now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.