What is IKEV2 and L2TP for?

Question

linux

Good evening!
What is L2TP and IKEV2 for?
What are they doing?
I searched on the Internet, but since I am new to this, I did not quite understand.
Thanks in advance.

Answer 1

here

Answer 2

"IKE (Internet Key Exchange) is a standard protocol of the IPsec protocol suite" ((C) Wikipedia)
L2TP is also included in this group, along with PPTP, PPPoE and others. And functionally, this is all = VPN, needed to prevent MiTM attacks.
The further answer depends on whether you know all these buzzwords that I have listed here. If you do not know, then Wikipedia has basic knowledge. And what remains unclear - ask, I'll tell you what I know.