CCNA Interview Based Studies.

IOS ( Internetwork Operating System)

IOS is using as an interface for router and switch.

Latest Version -->15.0(1)M

RSP -- Router switch Processor

RSP functions -- Coordinate and process application

Router Models -- 1600,2600, 2800, 3600

ROM (Read Only Memory):

--POST (Power On Self Test)

--Boot Strap Loader/(File)

--Mini IOS

--IOS MicroCode

RAM (Random Access Memory):

--Running Configration.

--Routing Table

--ARP Table

--CDP(Cisco Discovery Protocol)

NVRAM (Non volatile Random Access Memory):

Start up routing configuration saves in NVRAM.At booting time NVRAM loads configuration to RAM

Flash:

Fully functional IOS saves in flash.