1 | Devices must establish sessions to communicate |
2 | A virtual circuit (PVC, SVC) is a logical connection created to ensure reliable communication between two network devices (multiple virtual circuits can be multiplexed) |
3 | DTE |
4 | DTE |
5 | PAD |
6 | PAD |
7 | X |
8 | X |
9 | X |
10 | X |
11 | DCE |
12 | DCE |