4 ms·
> A MAC address is needed to bootstrap IP... This is fundamentally incorrect. IPv4 for LAN, sure - but "bootstrap" it is not. There's plenty of L2 that have
by windexh8er 1y ago
> A MAC address is needed to bootstrap IP...
This is fundamentally incorrect. IPv4 for LAN, sure - but "bootstrap" it is not.
There's plenty of L2 that have no MAC: PPP, ATM, Frame Relay, etc. Also, MACs aren't needed for IPv6. ND works without MAC in v6.
And, finally... There's no MAC for loopbacks.
- chasing0entropy 1y agoNone of those l2 protocols can traverse a wan without an encapsulation layer which always requires an address or link to the physical layer.
- immibis 1y agoSure they can - a WAN is the same as a LAN, but bigger. However, that comes with different tradeoffs, in particular the need to reduce bandwidth by using less chatty protocols. But you can absolutely rent a fiber between two buildings in the same city and run Ethernet on it.