I want to know, Why do we use WAN protocols instead of ethernet, apart from cabling limitations?
Also, how exactly WAN works, like How the router forwards the packet over the WAN? e.g using ppp
Do WAN protocols also rely on TCP for guarantee delivery?
I also read somewhere, PPP does not use destination address over WAN. Why is that?
Sorry for all newbie questions.
I would be happy if somebody describes to me clearly.