CCNP Routing and Switching ROUTE 300-101 Official Cert Guide

Hashing Authentication

The basic operation of hashing authentication bears some similarity to plain text authentication. Notably different, however, is how hashing authentication never transmits a key across a network, instead sending the hash digest (that is, the result of running a hashing algorithm on a router’s configured password).

The hashing authentication process follows a procedure that can generally be summarized as follows:

Step 1. A hashing algorithm is run on a routing update along with a router’s configured key. The result of the hashing algorithm (that is, the hash digest) is added to the end of the routing update, which is then ...