DIFFERENT MEMORIES OF ROUTER

1-RAM
2-ROM(Post,Boot Strap,Mini ios,Rom-Monitor)
3-Flash Memory
4-NVRAM
5-Config-Register value

1-RAM:-RAM is used to  load the IOS from flash memory,IOS is stored in flash memory in compressed form,During the booting process of Router the IOS is compressed and loaded of Router the IOS is compressed loaded in RAM.
RAM is working memory of Router.

2-ROM:-
   POST(Power on Self Test):-It checks weather all devices getting proper power ON or Not?

   BOOT STRAP:-It helps to find and load device configuration file and IOS of Router.

   MINI-IOS:-The Mini-Ios component is not present in every Router.The Mini-Ios components    provides an alternet file for Route boot up.If the Existing image files is unavailable.


    ROM-MONITOR:- ROM-MONITOR is a program stored in the RAM which is used to debug user program.
                The ROM Monitor also allow manufacturing testing of troubleshooting of ROM.


3-FLASH:-Flash Memory in a Router is a Non-Volatile storage Medium.it is basically contains IOS images files using which the Router can boot.

4-NVRAM:-NVRAM is a type of random access memory that stores configuration files for Router.

5-CONFIGURATION VALUE:-It is a 16-bit hexadecimal value,which defines the booting process of Cisco Router.
OX2102-Normal Mode
OX2142-Maintance Mode

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