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



Inter Vlan Routing

Router on a stick

Now we will configure inter-vlan routing for which we will use our previous topology.
previous topology -
i have added one router into this topology to configure Router on a stick.
router's f0/0 is connected to Switch_1 on f0/20.

Commands to configure router for inter-vlan routing.


Router#configure terminal

Router(config)#interface fastethernet 0/0

Router(config-if)#no shutdown


Router(config)#interface fastethernet 0/0.20

Router(config-subif)#encapsulation dot1Q 20

Router(config-subif)#ip address


Router(config)#interface fastethernet 0/0.30

Router(config-subif)#encapsulation dot1Q 30

Router(config-subif)#ip address


Router#show ip interface brief

Commands to configure Switch_1


Switch_1#configure terminal

Switch_1(config)#interface fastethernet 0/20

Switch_1(config-if)#switchport mode trunk



Switch_1#show interfaces trunk

That's all, now you just have to assign default gateway to each computer.
If the computer is in VLAN 20 then default gateway should be
and If the computer is in VLAN 30 then default gateway should be
after this all computers should be able to ping each other.


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