LINUX:In 1969 AT&T made a decision to withdraw Multics and go with GECOS (General Electric Comprehensive Operating Supervisor / System), with AT & T in Bells Lab when Multics was withdrawn some of the programmers named Ken Thompson and Dennis Ritchie decided to rewrite operating system in order to support low cost computer..To Know More



    MICROSOFT:Microsoft was established to develop and sell BASIC interpreters for the Altair 8800. It rose to dominate the home computer operating system market with MS-DOS in the mid-1980s,followed by the Microsoft Windows line of operating systems. To Know More



    CISCO:During the early 1980s, there was a married couple namely Len and Sandy Bosack who used to work in two different departments of computer located in Stanford University. This couple was facing problem in making their computers communicate with each other To Know More



Telnet configuration

We will use this topology to configure telnet, there are two routers in topology R1 and R2. we will configure telnet on R2 and we will use one of the Laptop which is connected to R1 network, but actually you can access R2 from any Laptop/Location after configuring telnet.

I have already configured RIPv2 on both router so the network is fully converged.

Now lets see the commands to configure telnet on R2.

R2#configure terminal
R2(config)#enable secret ittables
R2(config)#banner login # Password Require #

Note: configuring login banner is optional, but you can use "banner login" command to configure login banner.

R2(config)#line vty 0 4

 Note: By default there are 16 virtual terminal in router which are numbered 0 to 15, but right now we are opening only 5 virtual terminal line by using "line vty 0 4" command. it means we are opening 0 to 4 line number. it means you can telnet the router at a time from 5 different location.  


By using this command you will require to provide "" password.


This command is to enable motd banner which we have configured previously. ( As i told you its a optional ).

R2(config-line)#exec-timeout 5

"exec-timeout" command is to limit your idle time in this session, in this case we are using 5 min.


"login" command is use to enable password checking. You can use "no login" command if you wish to enter into telnet session without prompting for password.


Now lets see how to access R2 ( from PC
I think you got all thing in this image.


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