Protocol is an agreement between user and interface. The basic mechanism for transmitting information and for the receiver to detect the presence of any transmission errors. When a transmission error is detected, even if it is only a single bit, then the complete data block must be discarded. This type of scheme is thus known as best try transmission or connectionless transmission.

CLOSING THE GAP

Network systems have employed embedded processors to offload protocol processing and computationally expensive operations for more than a decade. In the past few years, however, the computer industry has been developing specialized network processors to close the transmission-processing gap in network systems.

Today, network processors are an important class of embedded processors, used all across the network systems space from personal to local and wide area networks. They accommodate both the Internet's explosive growth and the proliferation of network-centric system architectures in environments ranging from embedded networks for cars and surveillance systems to mobile enterprise and consumer networks.

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