Wednesday, September 22, 2010
1. VC based Multiplexing (AAL5Mux)
2. Logical Link Control Encapsulation (AAL5Snap)
VC based Multiplexing (AAL5Mux) is used to carry one protocol per PVC. e.g. If we want to forward IP and IPX over ATM, in this case we need to define two dedicated PVC. One PVC will carry IP and another will carry IPX. As the number of protocols will increase, PVC will also increase.
Logical Link Control Encapsulation (AAL5Snap) is used to carry multiple protocols in single PVC. In this case user multiplex all the protocols in one PVC. To differentiate PDU, Logical Link Control header is added.
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