How does communication between 2 computers in a single network happen?

Posted by learner on Super User See other posts from Super User or by learner
Published on 2013-11-12T20:17:19Z Indexed on 2013/11/12 21:57 UTC
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networking

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ip

Lets say I and my friend connect our computers with a LAN cable.

I ping my friend with his IP address.

How does it work?

Since we are in the same network, we don't even need IP addresses, do we?

Isn't IP addressing only relevant in case of inter-network communication?

What will the ping command do with his IP address? How will it eventually find his physical address (NIC address)? (no ARP here, because that would involve a router at the edge of the network, which doesn't apply here).

Am I wrong somewhere?

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