Cisco IOS gives you four ways to exit configuration mode back to privileged EXEC mode: Ctrl-Z, Ctrl-C, and the "end" and "exit" commands. At first, these methods may appear similar...
If your Cisco router supports encryption, you can use the following commands to create a RSA keys so you can connect to the router with SSH instead of with an insecure telnet connection...
Power interruptions from storms, brownouts, and other glitches lasting only a few seconds or less can wreak havoc on a network. Even the shortest outage can potentially stop important applications and cause an administrator to have to manually reset a router.
When configuring a router remotely, it's possible that if you make a mistake, you might accidentally lock yourself out. If you're next to the router, you could just reboot it, but what if you're nowhere near it?