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This article mainly explains "which hardware devices the computer network consists of". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what hardware devices the computer network consists of".

1. Network card

The network card, also known as the network adapter (Network Adapter), is the interface that connects the computer to the transmission medium. The network card is mainly used to convert computer data into signals that can be transmitted through the transmission medium.

If a computer needs to surf the Internet, it needs a network card. Due to different ways of surfing the Internet, network cards are also divided into different types:

1. Wired network card

A wired network card is a network card connected to the network through a "wire". "line" refers to the network cable. The common forms of wired network cards are as follows:

two。 Wireless network card

As the name implies, the wireless network card does not need a network cable to connect, but through the wireless signal connection. The wireless network card usually refers to the wireless network card of the Wi-Fi network. The common forms of wireless network cards are as follows:

3. Bluetooth adapter

Bluetooth adapter is also a kind of wireless network card. They just communicate in different ways. Common styles of Bluetooth adapters are shown below:

The network card is usually the subordinate device of the network device. According to its installation mode, the network card can be divided into internal network card and external network card:

1. Built-in network card

As the network card has become a necessary device to connect to the network, so many network devices have built-in network cards. Therefore, the built-in network card is also called integrated network card. For example, today's motherboards are integrated with wired network cards, as shown in the figure. The interface indicated by the arrow is the wired network card interface provided by the built-in network card.

two。 External network card

In addition to the built-in network card, many network devices allow users to install additional network cards. This kind of network card is called external network card, sometimes called independent network card. Because it can be inserted in various expansion slots of the motherboard, it can be disassembled at will and has a certain degree of flexibility. The wired and wireless network cards mentioned above belong to external network cards.

2. Network cable

Network cable is used to connect various devices in the network for data communication between devices. Common network cables are twisted pair, optical fiber, telephone line and so on.

1. Twisted pair

The twisted pair is also called the network cable. It is made up of two copper wires with an insulated protective layer. There are eight copper wires altogether. Each root is distinguished by its corresponding color. In real life, computers in homes and businesses generally connect to the Internet through twisted-pair cables. These twisted pairs are often sorted in the order of EIA/TIA 568B, which is orange-white, orange, green-white, blue-white, blue-white, green-white, brown-white. As shown below:

two。 Optical fiber

Optical fiber is a kind of thin and soft medium that transmits optical signals. most optical fibers must be wrapped by several layers of protective structures before use. The main function of optical fiber is to convert the data to be transmitted from electrical signal to optical signal for communication. "light cats" are installed at both ends of the optical fiber for signal conversion. As shown below:

3. Telephone line

A telephone line is the line that connects the phone. Telephone lines are also made up of copper wires with an insulated protective layer. Unlike twisted pair, there are only two or four phone lines, and they are not necessarily intertwined and are not sorted in color, as shown below:

III. Network equipment

Network devices refer to the devices in the composition of the network, such as switches, routers, modems and so on. They are terminal devices that send or receive data.

1. Exchanger

A switch (Switch) can connect multiple network devices to form a local area network. It is a kind of network equipment used for electrical (optical) signal forwarding and data exchange. The switch is shown in the following figure:

two。 Router

Router (Router), also known as gateway device (Gateway), is a common device in daily life. It is used to connect multiple logically separate networks. The so-called logical network represents a single network or a subnet. When data is transferred from one subnet to another, it can be done through the routing function of the router. It will automatically select and set the route according to the condition of the channel, and send the signal in the order of the best path. Routers are also used for data conversion. It is easy to distinguish between a router and a switch. The biggest difference is that the router has WAN ports and LAN interfaces, while the switch does not have these interfaces. As shown below:

3. Modem

Modem (Modem), commonly known as "cat", is a kind of computer hardware. It can translate the digital signals of the computer into pulse signals that can be transmitted along the ordinary telephone line, and these pulse signals can be received by another modem at the other end of the line and translated into the digital signal language of the computer. As shown below:

At this point, I believe you have a deeper understanding of "which hardware devices the computer network consists of". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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