the Router

Connecting to the Router

We have three ways:

1. Auxiliary Port / Phone line 
2. Console Port / Rj-45 / Console Cable or Console cable-rollover
3. Telnet /  (USER MODE) ip net - 10Baset t

Cisco Router Components 

1. Bootstrap: boot the router & then load the IOS.    [Microcode of the Rom]
2. POST (Power On Self Test): check the basic functionality of the router hard ware.    [Microcode of the Rom]
3. Rom monitor: testing & troubleshooting.    [Microcode of the Rom]
4. Mini-IOS (Rx-boot / boot-loader): small IOS in Rom. load a Cisco IOS into flash memory.
5. RAM:  hold packet buffers, ARP cache, routing table.
6. ROM: star & main tent the router.
7. Flash memory: hold the Cisco IOS, NOT erased when the routers is reloaded, it is EEPROM.
8. NVRAM: hold the router & switch configuration.

Cisco Router 

Summary:

• Basic IOS: ROM
• Boot strap: ROM
• Diagnestics: ROM
• Current IOS: Flash
• Start up configuration: NVRAM
• Running configuration: RAM