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How the two computers are able to ping themselves which are connected to single router but both are in different Network?

author
ganesh warang

I have configured network as shown in figure. as we know that we can't ping computer which is in the other Network without routing protocol. then how I suppose to ping this computer as shown in figure without applying routing protocol. both computers in figure are in different Network.

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author
Inigo Mathew

We can ping between Pc's from different networks, If the two networks are connected to the same router's interfaces.

We are using routing protocols to give routers the knowledge where different networks exist. in this case If we check the routing table of the router, We can verify it, that both networks are directly connected.

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