What Are the Computer Network Connection Devices

1. Repeater

It is a device for amplifying signals in the process of signal transmission. It is a medium connection device in the network physical layer. Because the signal has attenuation and noise in the network transmission medium, the useful data signal becomes weaker and weaker. In order to ensure the integrity of the useful data and transmit within a certain range, the received weak signal should be amplified with a repeater to keep the same as the original data.

2. Hub

It is a signal regeneration repeater, which can disperse signals to multiple lines. One end of the hub has an interface connected to the server, and the other end has several interfaces connected to the network workstation. The number of hub interfaces determines the number of computers connected in the network. There are 8, 12, 16, 32 and other common hub interfaces.

3. Gateway

It is a device that connects two computer networks with different network protocols and different architectures. There are two kinds of gateways: one is a connection oriented gateway and the other is a connectionless gateway.

4. Bridge

It is a network node device, which can divide a large LAN into multiple network segments, or interconnect more than two LANs (which can be different types of LANs) into a logical LAN. The function of the bridge is to extend the network span and provide intelligent connection services, that is, forwarding and filtering according to the network segment in which the packet end address is located.

5. Router

It is the connection equipment connecting LAN and WAN. It plays a pivotal role in data forwarding and information resources in and out of the network. It is the core equipment of the network. When data is transmitted from one subnet to another, it should be completed through the router. The router selects the best path according to transmission cost, transfer delay, network congestion or the distance between source and destination.

6. Exchanger

It is a device that can construct its own "forwarding table" according to the network information to be transmitted and make forwarding decisions. The switch is a new device that appeared in the 1990s. Its emergence solves the situation that after the network segment division in the LAN, the sub network of the network segment must be managed by the router. It also solves the network bottleneck caused by the low speed, complexity and high cost of the traditional router.

7. Modem

A device that enables a computer to communicate with other computers through a telephone line. Because computers use digital signals to process data, while telephone systems use analog signals to transmit data. In order to use the telephone system for data communication, the exchange of digital signals and analog signals must be realized.

What Are the Computer Network Connection Devices 1

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