Types of Router Memory

RAM

Ram remains for "Irregular Access Memory". It's an unpredictable memory. A memory which is lost or expelled on turning off the gadget is called RAM (Volatile Memory). All configuration use to run RAM.

Specialized Name: Running Configuration

NV RAM

NV RAM remains for "Non Volatile Random Access Memory" of router on which all the configuration are spared in the router's memory.

Specialized Name: Start Up Configuration

How it functions

The accompanying order help to comprehend the how RAM and NV RAM functions.

Router#copy running-configuration startup-configuration

Here, the order says "Duplicate the running-configuration" that is RAM and glue it into the "Startup-configuration" that is NV RAM. That implies it is sparing all the work done on RAM in NV RAM. The charges acts as it worked in Assembly Language-"MOVE AX,BX".

Flash

"Flash" is a memory sort of router on which IOS of router is introduced e.g., like Windows are introduced on Hard Disk.

ROM

ROM remains for "Read Only Memory". At the point when Windows gets degenerate, we put an album/dvd in CD-ROM to boot up the framework and Windows Installation Process.

ROM memory that comprise of Baby IOS or we may call it "Booting Files" which are utilized to Boot up the router when it gets degenerate.

Essential Configuration of Router

At whatever point anybody gets some information about your qualifications/or gets some information about yourself it implies your "Validation" is being finished. Confirmation in feeling of web implies USERNAME and PASSWORD process. AAA server or Billing Server have 3 A's that implies

A=Authentication = who are you?

A=Authorization= what you can do?

A=Accounting= what you have done?

By joining these 3 terms we can get AAA server or Billing server. Yet, we are not examining here Billing Server.

In this we will think about Authentication. For instance, at whatever point a man tries to get to the router, it let that individual to access without Authentication. So we need that the PASSWORD must be sent for Authentication when anybody tries to get to the router.

Following are the Password sorts that can be set before getting to the router

Line Console

Enable Password

Secret Password

Line Console0

Line Console0 is a password that permits user or lead the user to get to USER EXEC MODE of the router.

e.g.,

Password:xxxxxxx  (Enter)

Router>enable

Whenever we want to configure anything, it is always done on Global Configuration Mode. Following are the commands

Router>enable (Enter)

Router#configure terminal (Enter)

Router(config)#line console0 (Here we go to Line Console0)

Router(config-line)#password ciscouser (we set password ciscouser)

Router(config-line)#login (we are saying that ask Password when person login)

Router(config-line)#exit

Router(config)#exit

Press return to get started again

User Access Verification

Password:xxxxxx

Router>

Enable Password

Enable Password allows a user to access Privilege Mode. It is set before the privilege mode. It is important as all the verification is done on this mode so it must be protected.

e.g.,

Password:xxxxxx (Line Console0)

Router>enable (Enter)

Password:xxxxxx

Password:xxxxxx (Enable Password)

Router#

How to do that follow the instruction below

Password:xxxxxx (Enter)

Router>enable (Enter)

Router#configure terminal (Enter)

Router(config)#enable password ciscouser (Enter)

Router(config)#exit (Enter)

Router#disable (Enter)

Router>enable (Enter)

Password:xxxxxx (Enter)

Router#

Secret Password

Secret Password is a password that also set to protect Privilege Mode of the router so it is set before Privilege Mode. It is necessary because there is command “Show” e.g.,

Router#show

It shows all possible passwords except Secret Password. So, if the hacker access the network and try to hack the password it only hack Enable and Line Console0. There is still Secret Password to protect the router.

Password:xxxxxx (Enter)

Router>enable(Enter)

Password:xxxxxx(Enter)

Router#configure terminal (Enter)

Router(config)#enable secret usersecretpassword (Enter)

Router(config)#exit (Enter)

Router#disable(Enter)

Now again command the running configuration of RAM

Router#show

It shows all the running configuration and as well as all the set passwords except the Secret Password..

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