Cintreuk

1) User execution or user exec or user mode

    It is the first default mode of the Cisco routers command prompt.
   User cannot perform maximum configuration task in this mode but it is important because it is the      only way to go to the other modes of the Cisco routers command prompt.
2) Privilege execution mode or privilege mode

    it is the second main mode of the Cisco routers command prompt. it is used for show all the               configuration of the Cisco router.
    For Example- security, host-name, IP address.

Note-all the show commands runs in the privilege mode.
     Examples-show acl
                        show running-config
     user can also edit some internal configuration like copy, erase etc.in the privilege mode.
3) Global configuration mode or configuration mode

It is the third and most important mode of the Cisco routers command prompt.
User can perform maximum configuration tasks in this mode. it became more important now because it is the only way to go to the next mode of the Cisco router.

Line modes-

4) Console mode

console mode is used for control the physical access of the Cisco router.

command-

Router (config)#line console 0

For go back to previous mode-
Router (config-line)#exit
or ctrl+z to go directly to privilege mode.

5) VTY mode/telnet mode

VTY stands for virtual teletype.
VTY is also called telnet mode of the Cisco router.used for telnet control of the Cisco router.

command-Router (config)#line vty 0 4
To exit -Router(config-line)#exit

6) Auxiliary mode-this mode is used for control the modem access of the Cisco router.

command-Router(config)#line aux 0
To exit-Router(config-line)#exit

7) Routing mode-this mode is used for perform routing.

command-Router(config)#router rip
To exit-Router(config-router)#exit