The Features And Operating Principles of Switchs

An switch is a network device used for electrical signal forwarding. It provides an exclusive electrical signal path for any two network nodes that access the switch. The most common switch is an Ethernet switch. Other common switchs are telephone voice switchs, fiber switchs, and so on. 

Characteristics

Because the switch has a very high bandwidth internal switch matrix and back bus, and all the ports are attached to the back bus, the data can be directly and quickly transmitted to the destination node instead of all nodes through the internal switching matrix. It will not waste network resources, resulting in very high efficiency. At the same time, the security of data transmission is very high, which is welcomed and generally praised by users. 

The difference in bandwidth shared by each port of the hub is the exclusiveness of the data bandwidth of the heat switch. Under this premise, the switch can transfer data to multiple nodes in the same time period, and each node can enjoy a fixed partial bandwidth as a separate network segment. This eliminates the need to compete with other devices. 

Operating Principle

The switch works in the second layer of the OSI reference model which is the data link layer. The CPU inside the  switch will form a MAC table by mapping the MAC address to the port when each port is connected successfully. In future communications, packets destined for this MAC address will be sent only to their corresponding ports, not all ports. Therefore, the  switch can be used to divide the data link layer broadcast, which is called the collision domain. But it can't divide the network layer broadcast that is the broadcast domain.

After receiving any data transmission instruction, any node of the switch performs a fast search for the address table stored in the memory, thereby confirming the connection location of the MAC address, and then transmitting the data to the node. If the corresponding location is found in the address table, the transfer takes place. If not, the switch will record the address for the next search and use. The switch generally only needs to send frames to the corresponding points instead of sending them to all nodes as a hub, which saves resources and time and increases the rate of data transmission. In short, the switch is a network device that can perform packet encapsulation and forwarding of data frames based on MAC address identification. The switch can learn the MAC address and store it in the internal address table. By establishing a temporary switching path between the originator and the target receiver of the data frame, the data frame can reach the destination address from the source address directly. 

The main functions of the switch include physical addressing, network topology, error checking, frame sequence, and flow rate control. The switch also has some new features, such as support for virtual LANs, support for link aggregation, and even firewalls. Heatsinks such as die casting heatsink, extruded aluminum heatsink,  zipper fin heatsink, heat pipe heatsink and vapor chamber heatsink can be applied in switch to dissipate heat. We can give you the best water cooling solutions! Welcome to contact us!