An Ethernet chip is a tiny controller that integrates an Ethernet media access controller (MAC) and a physical interface transceiver (PHY) into the same chip, eliminating many external components. A network processor is a microprocessor that provides the logic for sending and receiving data (including sound and video) in a communication network, without the need for other additional devices. The emergence of network chip (NP) technology is to meet the needs of the characteristics of the next-generation high-speed network, provide network quality of service (QoS) control, continuously adapt to new network applications, develop new network management models, and quickly respond to market demand for new network functions. A new chip technology introduced by the demand. It has the advantages of both general-purpose chips and integrated circuit ASICs (Application-specific Integrated Circuits). It not only has the high-speed characteristics of ASICs wire-speed forwarding messages, but also has the programmability of general-purpose chips. The research in this area is very active recently, and international well-known companies have launched their own products and standards, such as: C-Port (Motorola Motorola) C-5 network chip; IBM (International Business Machines Corporation) network chip set; Intel (American Intel Corporation, known for producing CPU chips) acquired the StrongARM technology after acquiring the Alpha processor division of DEC Corporation, and used it to Based on technology, IXP1200 network processor company AD was established. Relevant forums, such as: the linley working group holds advanced training courses and seminars on NP technology and provides expert analysis and technical reports, analyzing the market share of each NP product, the advantages and disadvantages of the products, etc.; the network chip established under the joint efforts of CSIX and CPIX Forum; and Intel Network Chip Forum. At the same time, the international conference on NP technology has also started. The first Network processor conference will be held on October 23, 2001. After that, it will be held annually. The 2002 Network Processor Conference will be held on October 22-25, 2002. held in the United States. In a word, NP technology is the trend of network development. It can not only reduce the development cost of developers, shorten the development time, and speed up the ability of product upgrading, but also protect the interests of users and reduce the investment and upgrading required by users in new network functions. It is of great significance both technically and economically.