Some concepts related to PPP

flypanda999

When we look at PPP, there is a saying in online materials that HDLC is bit oriented and PPP is character oriented. However, searching for characters and bits, we get the explanation that they mean that the controller is a specific character group & amp; N bits. However, no PPP frame on the Internet has any special characters. They all start and end with 7e. I don‘t think it‘s right. Please explain