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Virtual Circuit Multiplexing




According to the IEEE 802 family of standards (Ethernet, WiFi, etc), in VC Multiplexing (VC-MUX), each ATM Virtual Circuit (VC) carries PDUs of exactly one protocol type. When multiple protocols need to be transported, there is a separate VC for each.

Advantages:
  • VC multiplexing tends to reduce fragmentation overhead (e.g., an IPV4 datagram containing a TCP control packet with neither IP nor TCP options exactly fits into a single cell).



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