CCNA 4.2 Cisco Command Line Interface (CLI)
- CLI can be accessed by pressing "Enter" after router's boot up
- User mode allows user to view statistics data of the router
- Privileged mode allows user to view and change router parameter
- Configure terminal (config t) command allows user to be in global config mode and make changes to running-config (config running in DRAM)
- Configure memory (config mem) command allows user to make changes to startup-config (config stored in NVRAM)
- Configure network (config net) command allows user to make changes to router configuration stored on a TFTP host
- Config t, mem, net commands are all used to config info into RAM on router
- Interface command on global config mode allows user to make changes to an interface
- Subinterfaces allow user to create logical interfaces within the router
- Line command allows user to configure user-mode passwords
- Router term:
- ? command on any prompt allow user to obtain a list of commands on that prompt
- Router-command history:
![](http://1.bp.blogspot.com/_GKROBw-pB0U/Skq1SXR3JYI/AAAAAAAAAG0/mp5iu7zZ64E/s320/history.jpg)
- Show version command allows user to obtain basic configuration for system hardware, software version and boot image
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