Intro:
Authentication is a critical part of administrating your network devices. For the longest time, i know for a fact that alot of companies use a simple authentication mechanism. Namely a either a line password, or at best local user database authentication. The inherent problem of these is that they are static entries, and on top of that, you have to manually do it on all the devices in your network. If a change need to occur, it requires logging in to all of the devices and changing the password (and or username).
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