Router Internal And External Components

RAM :

Temporiry memory only contain runing configuration.

NVRAM :

Permananet memory contain all startup configuration

FLASH :

Conatin router IOS(internetwork Operating System).

ROM :

Just conatin the information like bios.

Interface Ports :

Mainaly used send and receive a packets.

Ethernet

Fast Ethernet Ports

Serial Ports

t1 : 1.544 mbps ( us )
e1 : 2.048 mbps ( asia country )

Console Port :

Access the router using physically plug the console cable

Auxilary Ports :

Access the router but outside of network using modem

SMPS :

Switch mode power supply ( maintain the power section )