How the master switch works

Many new types of Client/Server use sequence and multimedia skill presentation lead to the traditional shared network is far from meeting the requirements, which will promote the presentation of the main switch of the Internet cafe in the next network.

1. Definitions of Internet cafe trunk switches

A lan Internet cafe trunk switch has many ports, each of which has its own dedicated bandwidth and can be connected to different network segments. Communication between the ports of the internet trunk switch is parallel, which greatly improves the information throughput. To further improve functions, each port can be connected to only one device.

To interconnect the trunk switches of an internet cafe or connect to a high-end server, the trunk switch of a LAN cafe usually has one or several high-speed ports, such as MB Ethernet port, FDDI port, or 155MBATM port, then ensure the transmission function of the entire network.

The internet trunk switch improves the functions of the entire network by improving the port speed of the connected server and the granularity of the response frame buffer. Some high-end Internet cafe trunk switches also use full duplex skills to further increase the port bandwidth.

In the past, network devices basically used half-duplex task methods. That is, when a host sends data packets, it cannot accept data packets. When a host accepts data packets, it cannot send data packets.

Because the full duplex technique is used, that is, the host can still send data packets, but also accept data packets. The popular 10 m port can be set to 20 m port, and the popular m port can be set to m port, this further improves the information throughput.

2. Working Principle of the Internet cafe trunk Switch

The traditional internet cafe trunk switch is essentially a multi-port bridge with traffic control capabilities, that is, the traditional (second-layer) Internet cafe trunk switch. Introducing the routing skills into the Internet cafe trunk switch can complete network-layer routing selection, which is called layer-3 switching. This is a new development of the Internet cafe trunk switch.

The job principle of the Internet cafe trunk switch (layer-2 switch) is similar to that of the bridge. It is a networking device for tasks at the link layer. Each port of an internet cafe trunk switch has a bridging function, each port can be connected to a LAN or a high-function website or server, and the connection status of each port can be investigated through self-learning. All ports are controlled by the dedicated-purpose server and forwarded through the controlled control bus.

You can also use specialized network management software for centralized management. To improve the speed and efficiency of data exchange, the Internet cafe trunk switch supports multiple methods.

(1) Storage forwarding:

All conventional bridges use this method. Before sending data frame columns to other ports, they need to completely store the received frames in the internal memory, check them, and then send them to other ports, in this way, the latency is equal to the sum of the time spent on accepting a sound data frame and the time spent on processing the data frame. If the cascade is very long, it will lead to severe functional problems, but this method can filter out wrong data frames.

(2) cut-in method:

This method only checks the destination address of the data frame, so that the data frame can be transmitted immediately, and the latency is greatly reduced.

The disadvantage is that the error frame will also be transmitted. When the error frame probability is small, you can use the cut-in method to increase transmission speed. When the probability of a wrong frame is large, you can use the storage and forwarding method/to reduce the retransmission of the wrong frame.