| 摘要 |
A communication processor comprises a data link layer parser circuit ( 310 ) and a plurality of network layer parser circuits ( 322, 326 ). The data link layer parser circuit ( 310 ) receives a data link layer frame, and removes a data link layer header therefrom to provide a network layer frame as an output. Each network layer parser circuit corresponds to a different network layer protocol, and is selectively activated to receive the network layer frame and to process a network layer header therefrom to provide a transport layer frame as an output. The data link layer parser circuit ( 310 ) further examines a portion of the network layer frame to determine which of the plurality of network protocols is used. The data link layer parser circuit ( 310 ) activates a corresponding one of the plurality of network layer parser circuits ( 322, 326 ) in response, while keeping another one of the plurality of network layer parser circuits ( 322, 326 ) inactive.
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