CCNA Complete Guide 2nd Edition.pdf - Cisco Learning Home

RT1#show running-config interface FastEthernet 0/1
Building configuration...
Current configuration : 38 bytes
!
interface FastEthernet0/1
no ip address
shutdown
end
RT1#
- The privileged mode access passwords can be defined with either enable password {passwd}
or enable secret {passwd} global configuration command. Both passwords are case-sensitive.
enable password Used in older version of IOS (pre-10.3). Password is saved as clear text.
enable secret Mostly used in current version of IOS. Based on MD5 hash function.
Instead of simple encryption, one-way hash algorithm is used to
calculate the hash value of the password, where decryption is impossible.
- Cisco recommends the enable secret to be different from the enable password for better
security. If both of them are configured, the enable secret password will be in effect.
RT1(config)#enable password cisco123
RT1(config)#enable secret cisco123
The enable secret you have chosen is the same as your enable password.
This is not recommended. Re-enter the enable secret.
RT1(config)#enable secret cisco456
RT1(config)#^Z
RT1#show running-config | in enable
enable secret 5 $1$.1p/$BXYbAw2lQzs0EfHOjUPAP.
enable password cisco123
RT1#
- The terminal history size {num-of-lines} EXEC command can be used to set the size of
command history buffer for the current session; whereas the history size {num-of-lines} line
subcommand will permanently set the size of command history buffer for a particular line.
The default command history size is 10, which means the latest 10 issued commands are saved.
- Virtual TeleTypes / Terminals (VTY) are used for remote administration. Users connecting to a
router through Telnet or SSH are unable to choose which VTY line to connect to.
Note: The minimum number of VTY lines on a Cisco router is 5; and they cannot be deleted.
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Copyright © 2008 Yap Chin Hoong
yapchinhoong@hotmail.com