As an indispensable supporting role in network transmission-
Network Cable! The network cable plays an important role. Without it, there will be no transmission between networks, and there will be no transmission between all networks. It may be a bit absolute, but it is the case. The wide use and scope of the network cable affects thousands of computers and TVs...
As for the network cable, many people think that it can be used as long as it is plugged in. It is this kind of thinking that sometimes turns your high-level network cable into a low-level network cable, which makes you spend a lot of money without enjoying the same effect. Today, I will introduce the network cable. What is the difference between the shielded network cable and the unshielded network cable in the network cable. ? What are the ways to shield the network cable?
From the perspective of whether the network cable is shielded or not, there are two types of network cables, shielded and unshielded, but there are obvious differences in structure. The unshielded network cable only has a shielding layer on the outside, and the four pairs of twisted network cables inside have no shielding layer and are only separated and fixed by a cross-shaped frame in the middle. In addition to the shielding layer on the outside of the shielded network cable, the internal four pairs of twisted network cables are also shielded by aluminum foil.
The drain wire reduces both external interference and external radiation interference. The role of the former is equivalent to reducing the bit error rate of data transmission and improving the stability of transmission performance; the role of the latter is directly manifested in reducing interference to other network cables and improving the confidentiality of transmitted data. Users who have certain requirements for data transmission security can consider choosing it. For working environments with harsh electromagnetic environments, shielded wires are required (such as industrial Ethernet, high-density use of high-voltage equipment, automated factories with variable frequency motors, etc.). Users with higher safety and reliability requirements are recommended to use all optical fibers. ? Outside interference and external interference are relatively small,
The CAT7 cable also shields the twisted pairs in the network cable pair by pair, and the interference between the pairs is small, so the transmission stability and transmission speed (data rate) are greatly improved.
At present, the category of network cables is getting higher and higher, from category 5 to category 5, category 6, category 7, and category 8. It has to be surprising that the network transmission is developing rapidly, and the requirements are getting higher and higher.
At present, the category of network cables is getting higher and higher, from category 5 to category 5, category 6, category 7, and category 8. It has to be surprising that the network transmission is developing rapidly, and the requirements are getting higher and higher.
When choosing a gigabit network cable, non-industry people will pay attention to the type, such as: Category 6 unshielded network cable (CAT6), Category 6 single-shielded network cable (CAT6), Category 6 double-shielded network cable (CAT6), and Category 6 unshielded network cable (CAT6A), Category 6 double-shielded network cable (CAT6A), and Category 7 cable (CAT7)... Generally speaking, when choosing, the standard configuration of gigabit network is Category 6 unshielded network cable
(CAT6) When using it, the layman just plugs it in and it's done, without even considering whether there will be crosstalk problems.
At present, the latest network cable is a Category 8 network cable, but the maximum transmission distance of this network cable is about 40 meters, and the use range is too small. A new type of crystal head is used, and the transmission effect will be better!
