I would have some basics questions.
I know MPLS is considered as a 2.5 OSI layer protocol. So, what layer 2 and layer 1 protocols it generally use ?
Also, is is true that nowadays ATM is considered obsolete ?
If yes, what protocols or new technics make it obsolete ? MPLS ? FTTH ? Ethernet Gigabit ? GPON ? Or others ?
And bonus question, same as MPLS previous question, what layer 1 protocol generally use ATM ?
Thanks in advance !
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