Cisco
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! Cisco

. , Cisco 4 2 . Cisco :
- ROM
- FLASH
- RAM
- NV-RAM
- ( )
- CLI (Command Line Interface)
ROM , (ROM - monitor) . , , Power On Self Test (POST). , IOS -. - . IOS Cisco.
- IOS, ROM IOS. ROM . ().
IOS -, (RAM). NVRAM. NVRAM- , .
IOS , TFTP. TFTP , IOS . , .
IOS NVRAM, .
, 4 Cisco IOS, :
- ROM - . . -, . ROM. IOS, ROM.
- FLASH - - IOS , , IOS . .
- RAM - (random access memory). Cisco. .
- NV-RAM - . NVRAM , .
Cisco IOS .
, . . :
- Serial interface
- Ethernet interface
- Fast Ethernet interface
- Gigabit Ethernet interface
. , FastEthernet FastEthernet0/0. , . , , . , 2 .
: i) FastEthernet0/2
() . . :
- Console ports
- Auxiliary ports
- VTY ports
- USB ports
, . , - : Console0
Command Line Interface (CLI)
IOS Cisco. Cisco. telnet-. CLI .
Cisco . :
- .
- ROM
- POST
- IOS - -
- IOS -, IOS .
- IOS -, .
- IOV NVRAM (startup config)-
- NVRAM, IOS TFTP.
- TFTP , .
- NVRAM, .
- .