Switch classification

There are many types of switches with different performances, and they can be classified from different angles. The main classification methods are as follows:

1. Classification by network technology used

1.Ethernet switch; used for Ethernet.

2.Token ring switch, used for token ring network;

3.FDDI (Fiber Distributed Data Interface) switch; used for FDDI network;

4.ATM switch; a network using ATM switching technology.

2. Classification according to the rate of the switch

1.10Mb / s switch, the rate of each commodity is 10Mb / s, it is also called a workgroup switch, and the price is cheaper;

2.Mb / s / 100Mb / s adaptive switch; it can automatically detect the transmission rate and working mode of the equipment connected to the commodity, and automatically make adjustments to ensure that the nodes of 10Mb / s and 100Mb / s can communicate with each other.

3.100Mb / s switch; 100Mb / s switch and 10Mb / s / 100Mb / s adaptive switch are collectively referred to as Fast Ethernet switches, and the rate of each commodity reaches 100Mb / s, which can provide 100Mb / s dedicated connection or work The connection of the group is called the backbone switch.It is a department-oriented switch.It can be a fixed configuration or a module configuration.Generally, it has a fiber interface.

4.1000Mb / s switch; the rate of each product is 1000Mb / s, in addition to providing adjustment switching, it also has a strong network management function, mainly used as the network's backbone switch, generally used for adjustment of enterprises, institutions and schools local area network.

3. Classification according to the working protocol layer

1. Layer 2 switch: Lead xian link IP information to complete data exchange, all switches can work at layer 2;

2. The third layer switch; lead the xian network layer IP information to complete the data exchange, and realize the wire-speed exchange of data between different network segments;

3. The fourth layer switch: rely on the service process and protocol included in each IP packet header in the transport layer to select data exchange.

4. Classification by way of switch

1. Straight-through switch; only reads the target address field in the second layer header, does not check for errors, and directly forwards to the output port, so its rate is relatively fast;

2. Store-and-forward switch: The controller first buffers the data packets input to the port until all frames arrive, check whether they are correct, filter conflicting packet errors, and then forward them to the output port.

3. Fragmented isolated switch, a model between straight-through and store-and-forward.

V. Classification by switch application

Electrical port (network) switch, fiber optic switch, photoelectric hybrid switch, POE switch, industrial switch, industrial grade POE switch