I had this blog post lying around as a draft for a long time. I didn't think it was was "meaty"
enough yet, but since I'm no longer a network consultant I don't think it'll become any meatier.
So here it goes.
Here I will describe the process of L3-to-L2 mapping, or next-hop resolution and how it
works with point-to-point circuits like PPP, ATM and Frame relay. It's the
process of finding out what to actually do with a packet once the relevant routing table entry
has been identified.
It's deceptively simpler than on a LAN segment, but since people generally learn
Ethernet before they learn point-to-point nowadays I'm writing it anyway.
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