Tell us about the network cable

It is 4 groups of entanglements, that is, eight followers. The colors are white, clear, white-green, green, white-blue, blue, brown, brown.

When making network cables, if you do the machine to the machine, you must exchange 1 and 3, 2 and 6 lines, and if you do the machine to the switch, you can directly follow the order.

In addition, those who strongly despise online copy answers, do not think about anything, and paste them directly, a lot of words.

There are three types of network transmission media:

Coaxial cable. Optical fiber.

Twisted pair. What we generally refer to as network cables usually refers to twisted pair cables, which are eight wires that are twisted together with each other. They are orange, orange-white, green, green-white, blue, blue-white, brown-white, brown-white.

In the production of network cables, there are many skills, which play a very important basic role in the optimization of LAN performance. Generally speaking, there are several production methods of twisted pair wires, which should be paid attention to one-to-one correspondence and cannot be misused.

One-to-one correspondence. That is, the two ends of the twisted pair should be connected to each other, and one foot at one end must be connected to one foot at the other end. This kind of network cable is generally used.

Between the switch and the computer.

6. Cross-connection method. That is, the first foot of one end of the network cable is connected to the third foot of the other end, the second foot of one end of the network cable is connected to the sixth foot of the other end, and the other feet correspond one by one. This kind of network cable is generally used in the cascade of switches.

100m connection. The so-called 100M connection method means that it can meet the communication rate of 100M bandwidth. Although its connection is also a one-to-one correspondence, the color of each foot is fixed, specifically:

1st Foot - Yellow & White, 2nd Foot - Yellow, 3rd Foot - Green & White, 4th Foot - Blue, 5th Foot - Blue & White, 6th Foot - Green, 7th Foot - Brown & White, 8th Foot - Brown.

At present, the most commonly used method is the one-to-one correspondence method, but after experiments (between different floors, the longer one is more than 60 meters) found that the workstation connected by this wiring method will often appear to crash when opening the file on the server, and if the third connection method is used instead, the network quality has been greatly improved, and the above situation rarely occurs. Therefore, it is best to use the third network cable production method when connecting the network cable (that is, the interconnection from the hub or switch to the workstation), so as to maximize the speed advantage of the Category 5 or super Category 5 network cable and keep the network smooth at all times.

QThe go and study here.

Brother on the second floor, what you said doesn't seem right, right?! At least I don't think so, I'll introduce you:

There are 2 kinds of twisted pair arrangement, which are 10m and 100m, and generally we are arranged according to 100m:

White, orange, white, green, blue, white, blue, green, white, brown.

10m: white-green, green, white-orange, blue, white-blue, orange, white-brown, brown.

It is used between general devices (such as modem, hub) with 100m at both ends, and when two computers are connected, it is OK to row 100m on one side and 10m on the other.

Twisted pair, I can only tell you, it's about the eight stamens, as long as the computer is thicker the better, now the market is 0 35 square, the better is 0 51, which will double the speed of opening web pages, but the 0 51 is more expensive

Categories: Computer, Networking, >> Hardware.

Problem description: What is a network cable?

Analysis: Ethernet cable.

To connect to a local area network, a network cable is essential. There are three types of network cables commonly found in LAN: twisted pair, coaxial cable, and optical cable.

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.

It has two kinds of STP and UTP, and the twisted pair we commonly use has a layer of metal separator film in it, which can reduce electromagnetic interference during data transmission, so its stability is higher. There is no such metal film in UTP, so its stability is poor, but its advantage is that it is cheaper. The twisted pair of UTP is generally about 1 yuan per meter, while the twisted pair of STP may be cheaper than a few yuan per meter, and the expensive one may be more than ten yuan per meter.

The purchased twisted pair can generally be made at the merchant's place to make the twisted pair and RJ45 connector, and take it back for use. If you have leisure, you can also make your own, but you need to buy a pair of clamps. There are a total of eight twisted pairs, and the wiring rules for the eight wires are 1236 lines are useful, and 4578 lines are idle.

Coaxial cable is a cable wire that is wrapped with a copper conductor by layers of insulated wires. It is characterized by good anti-interference ability, stable transmission data, ** is also cheap, and is also widely used, such as CCTV lines, etc. The general market price of coaxial thin cable is a few yuan a meter, which is not too expensive.

The coaxial cable is used to connect with the BNC head, and the coaxial cable sold on the market is generally a finished product that has been connected to the BNC head, and you can choose it directly.

Optical cable is the most advanced network cable at present, but it is more expensive and rarely used in household occasions. It is made up of many hair-thin fiberglass fibers plus an insulating sleeve. Because it relies on light wave transmission, it is characterized by excellent anti-electromagnetic interference, strong confidentiality, fast speed, large transmission capacity and so on.

The letters and numbers on the network cable respectively represent: brand, type of network cable, production network cable standard, shielding type, use scenario, meter number mark, unique mark of the jumper, etc.

1. Brand. You can check whether it is a purchased brand according to this logo, and beware of unscrupulous merchants who transfer contracts and make them shoddy. Generally, the box line (without crystal head) brand logo will be printed on the company's official website.

2. Types of network cables.

At present, the network cable on the market is basically divided into: Category 5 network cable (Cat5), Category 5e network cable (Cat5E), Category 6 network cable (Cat6), Category 6 network cable (Cat6A), Category 7 network cable (Cat7), etc.

3. Make network cable standards.

AWG is the abbreviation for the American wire standard, and the AWG value is a function of the thickness of the wire in inches. The diameter is 24AWG, which is about.

4. Shielding type.

According to the shielding type, network cables are divided into: unshielded (UTP), single shielded (FTP), and double-shielded (SFTP). The main purpose of shielding is to reduce signal interference and ensure information security.

5. Usage scenarios.

SolidLancable stands for a solid core that is used in a LAN environment.

6. Meter marking.

In the actual wiring yard selling cherry blossoms, the meter mark is the most practical, and only appears on the box line logo. na has no special significance, just to better separate the meter mark from the front mark, so that it is easy to see quickly.

7. The unique mark of the jumper.

Jumper, that is, with its own crystal head, because the connection of the crystal head is divided into T568A and T568B, so the jumper will mark the connection of the crystal head. TIA EIA stands for the standard of the crystal head connection method of network cables, and is generally abbreviated as "T".

This kind of telecom operator pulls out from the ** door near you, such as Tietong, which is generally a DSL line, similar to the ** line, with 4 thin wires in it, and the network card head for the crystal head.

The specific cat and the host are connected to the crystal head larger than the ** line Whether the specific problem can be solved is mainly the fault you are looking for, right. Call you to the one who presses the net to take a look. I guess it's free. You are consuming, and at this time you don't look for him, who to find.

It's not necessarily a problem with the network cable, maybe it's a telecom problem? You try to call 1000 and ask them to solve the next one. If not, then replace it