What does the black wire mean, and what is the network cable?

I don't quite understand what you're saying, I just know that there are eight wires in the network cable, and one of them is a black line (which can also be said to be a gray line).

The cable plugged into the LAN port of the network card behind the desktop computer host is the network cable, as shown in the red box in the following figure

A network cable is essential for connecting to a local area network. The common network cables in the LAN mainly include twisted pair and coaxial cables.

There are three types of optical cables. A twisted pair is a data transmission line that consists of many pairs of wires.

It is characterized by being cheap, so it is widely used, such as our common **line. It is used to connect to the RJ45 head.

Classification of network cables:

Class I cable: mainly used for transmitting voice (a class of standards are mainly used for ** cables before the early eighties), which is different from data transmission and has been eliminated by the standard.

Class II line: The transmission bandwidth is 1MHz, which is used for voice transmission and data transmission with a maximum transmission rate of 4Mbps, which is common in the old token ring that uses the 4Mbps standard token passing protocol, and has been eliminated by the standard.

Category 3 cable: The transmission bandwidth of the cable is 16MHz, which is used for voice transmission and data transmission with a maximum transmission rate of 10Mbps is mainly used for 10BASE--T, which is used by ANSI as the lowest use level.

1. The internal structure is different. Category 6 network cables.

The internal structure adds a cross skeleton, and the four pairs of twisted pair cables are placed in the four grooves of the cross skeleton, and the cross skeleton of the cable ** rotates with the change of length. Category 5 network cables.

There is no cross skeleton inside.

2. The size of the copper core is different. Category 5 network cables.

The copper core is below, and the six types of network cable standards are:

3. The external annotation is different. Category 5 network cables.

The outer skin will be marked with the word "cat5"; The outer skin of the six types of network cables will be marked with the word "cat6".

4. The scope of application is different. Category 5 network cables.

It is mainly used for 100 Gigabit network and 10 Gigabit network, and has been replaced by Category 5e line. Category 6 network cables are mainly used in gigabit networks, and their transmission performance is much higher than that of Category 5e network cable standards.

The network cable is mainly connected to the port of the network card behind the computer case, which is a near-square interface. Network cable, network cable, is a medium that transmits information from one network device (such as a computer) to another network device, and is the basic building block of the network.

In commonly used LANs, there are many types of network cables used. Under normal circumstances, a typical LAN does not use many different kinds of network cables to connect network devices. In large networks or WANs, different types of network cables are used to connect different types of networks together.

There are three types of network cables, namely twisted pair, coaxial cable, and fiber optic cable.

1. Twisted pair is a data transmission line composed of many pairs of wires. It is characterized by being cheaper and widely used, such as our common ** line, etc.;

2. Coaxial cable is a cable that is wrapped with a layer of insulated wire and a copper conductor;

3. Optical fiber cable is the most advanced network cable at present, but it is more expensive and rarely used in household occasions.

Do you remember that some cartoons say that when people are helpless, there will be beads of sweat + black lines on their foreheads, and crows will fly behind them.

That's what it means.

Expresses the character's state of mind when they are depressed or hit.

Internet language: confused, embarrassed, continue a topic.

The "black line" means:

Considered a reactionary line.

Comic expression. Pigmented white lines, usually used to show a character's state of mind when depressed or hit, occur in pregnant women.

Pronunciation: [ hēi xiàn ].

Sentence formation: 1) At first glance, it seems that it is impossible to see how much a few black lines on the photographic plate can give us about the stars.

What exactly is the black line on a woman's belly? Are they really stretch marks? Say it and you may not believe it.

A network cable, generally made of metal or glass, can be used to transmit information within the network. There are three types of network cables commonly used: twisted pair, coaxial, and fiber optic (fiber-optic).

A twisted pair is a data transmission line that consists of many pairs of wires. It is characterized by being cheap, so it is widely used. The twisted pair is used to connect with the RJ45 crystal header, there are two types: STP and UTP, and the commonly used is UTP.