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For questions about Internet Protocol (IP), an OSI layer-3 network protocol. There are two current IP versions in use: IPv4 and IPv6.

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(3) where it's now IP. Then : How this node knows the route to follow to the other node ? How do they communicates ? Do they use Ethernet ? If yes, the internet is then considered as a local …
asked Jun 21 '17 by Romain B.
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I just saw level 1-2-3-4 (from Physical to Transport) We have the following : The thing is: We know that at layer 3 there is the IP protocol that uses DNS Server to get the IP Address of the … destination (for example a website). Then we know that with the IP, our system call ARP to know what the MAC Address of the destination is (because Internet is based on Ethernet and Ethernet works with MAC …
asked Jun 20 '17 by Romain B.
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. But when we are routing with IP on layer 3, we are then going layer 2->1 and then 1->2->.. so do we use lower layers protocols ? Or are they used only for LAN routing ? …
asked Oct 30 '18 by Romain B.