Correct me if I'm wrong.
So,
Ethernet technology is being primarily used in LANs. And we use PPP in serial links. To carry IP datagram, we can use either layer 2 technology, such as Ethernet, or we need some layer 2 protocol supporting IP like PPP, if there is no layer 2 technology being used. PPP is a data link layer protocol for two devices connected directly without any device between them according to Wikipedia.
1) Can I use PPP to connect to my router from PC? If no, then why?
2) Why I need PPPoE? Where it is used (in which situations)?
3) So PPP was created only for the situation if there is no layer 2 technology? So we could use PPP.
It will be wonderful if you give me detailed answers and additional informations if I misunderstand something.
Best Answer
That depends. If you have network interfaces in your PC and router that support PPP, then yes.
PPPoE is needed for a link where the other end is running PPPoE. For example, many ISPs offering xDSL will use PPPoE, so you must use PPPoE to connect.
That is incorrect. PPP is one data-link protocol. There are many others, such as HDLC, frame relay, ethernet, token ring, ARCNET, FDDI, Wi-Fi, ATM, etc.