(The networking technology is the networking technology, which is divided into Ethernet networking technology and ATM local area network networking technology. Ethernet networking is very flexible and simple. It can use a variety of physical media and network with different topological structures. It is the most widely used network at home and abroad today, and it has become the mainstream of network technology. Ethernet is divided into 10Mb/s, 100Mb/s, 1000Mb/s according to its transmission rate)