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Network processor

Computer networks have evolved to a point where switch routers are insufficient to handle complex network routing and filtering requirements. In a computer network, data, such as text, images, sounds and videos, are typically communicated over the network from a source computer to a destination computer in pieces referred to as "packets." In most networks, packets usually are not sent directly from the source to the destination, but rather are routed by intermediate nodes known as routers. To improve the speed of packet forwarding, many routers employ network processors. Network processors are designed to optimize network-specific tasks and provide exceptional bandwidth, throughput and distributed processing capabilities, while reducing latency. Network processors offer real-time processing of multiple data streams, providing enhanced security and IP packet handling and forwarding capabilities. They provide speed improvements through advanced architectures, such as parallel distributed processing and pipeline processing designs. Network processors provide wirespeed frame processing and forwarding capability with function flexibility through a set of embedded, programmable protocol processors and complementary system coprocessors. Network processor receives frames, modifies them, and provides media interface for transmitting the frames out to switch fabric or to control processor. A network processor operates separately from the router's general-purpose processor and usually isolates the operating system on the general-purpose processor from the forwarding operations.

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