I wanted to ask a question about hdlc. I can't wrap my head around just exactly how it works, the in depth version of it? I know the basics of what I read, it communicates to serial leased lines together, but HOW does it do it? How does the isp get involved in the middle and how can one side be a dte and another be a dce when each end must end with a dce modem? Does the line just go straight into the device at the dte end? I'm really confused about this but I'm sure some clarity will really help me out!