Booting of the router

POST : Power on self test
ROM:
BootStrap: Initializing the router.

Flash

Nvram

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Config register value:

16 bits value

0000    0000    0000    0000

2    1    0    0    -----> Rom monitor mode

2    1    0    1    -----> ROm IOS ( mini-ios)

2    1    0    2    -----> (Default) Normal booting of the router

2    1    4    2    -----> Troubleshooting


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md5 = message digest 5 the encryption mecanism used to encrypt the password