DTE                          DCE

(station, router) ** ------ ** (modem) <==== провайдерский линк



EIA/TIA-232
EIA/TIA-449
V.24
V.35
X.21
G.703
EIA.530
HSSI



Data link encapsulation для синхронных линий:

Dedicated WAN
SDLC        - Synchronous Data Link Control
HDLC        - High-level Data Link Control
LAPB        - Link Access Procedure Balanced
PPP         - Point-to-Point Protocol

Switched WAN
Frame Relay - упрощеная версия HDLC фрейминга
X.25
ISDN

Last-modified: Fri, 26 Jul 2002 06:33:16 GMT