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From what I've understood, your ISP provides you an IP address and a subnet mask. The router can just ‘bitwise AND’ on that IP address and subnet mask to get the network ID(1).

So when we want to send a data to a different IP address, it just performs a ‘bitwise AND’ on that IP and the subnet mask to get the NID(2).

Now it can just compare the (1) and (2), to decide whether the new IP is in the same network or in a different network. If its in a different network, it just hops the data to the nearest router.

So my question is, now where does the routing table comes place?

 

in Computer Networks by (6 points) | 9 views
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If network is same, no need of two network address, 1 network address can store both information, but if networks are different , then two NID need to store differently in routing table. Routing table can be same, but NID will be different.

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