The level of network cable is mainly distinguished according to its transmission performance. Different levels of network cable have differences in transmission rate, transmission frequency, application range, etc. The following are some ways to distinguish the level of network cable:

　　First, check the outer skin label of the network cable

　　The outer skin of the network cable is usually marked with its category information, such as "CAT 5" (Category 5 network cable), "CAT 5E" (Super Category 5 network cable), "CAT 6" (Category 6 network cable), "CAT 6A " (Super Category 6 network cable)," CAT 7 " (Category 7 network cable), etc. By looking at these labels, you can preliminarily judge the level of the network cable.

　　Second, observe the internal structure

　　For example, the internal structure of the six types of network cables adds a cross skeleton, and the four pairs of cables of the twisted pair are placed in the four grooves of the cross skeleton. This design can reduce signal interference and improve transmission stability. While the five types of network cables do not have this structure.

　　Measure the size of the copper core

　　The size of the copper core of different grades of network wires is also different. Generally speaking, the higher the level of network wires, the larger the diameter of the copper core. For example, the diameter of the copper core of the fifth type of network wire is below 0.45mm, the diameter of the copper core of the super fifth type of network wire is between 0.45mm and 0.51mm, and the diameter of the copper core of the sixth type of network wire is between 0.56mm0.58mm. By measuring the size of the copper core, the level of the network wire can also be further judged.

　　IV. Understanding transmission performance

　　Different levels of network cables have differences in transmission performance. The following are the main transmission performance parameters of each level of network cable:

　　Five types of network cables: transmission frequency of 100 MHz, transmission rate of 100 Mbps, suitable for networks below 100 megabytes.

　　Super Category 5 network cable: The transmission frequency is also 100MHz, but the transmission rate can reach 1000Mbps (although the theoretical rate can reach gigabit, but the practical application is limited by factors such as equipment, usually used in 100Mbps networks), suitable for gigabit networks.

　　Six types of network cable: transmission frequency of 250MHz, transmission rate of 1Gbps (gigabit), also suitable for gigabit networks.

　　Super Category 6 network cable: transmission frequency up to 500MHz (also said to be 600MHz), transmission rate up to 10Gbps, mainly used in 10 Gigabit networks.

　　Seven types of network cable: transmission frequency up to 600MHz (also said to be higher), transmission rate up to 10Gbps, is a shielded twisted pair, mainly used in 10 Gigabit networks.

　　V. Consider application scenarios

　　Different levels of network cables are suitable for different application scenarios. For example, home networks generally use Category 5 or Category 6 cables to meet demand; while large data centers or high-speed network transmission scenarios may require higher-level network cables, such as Category 6 or Category 7 cables.

　　In summary, by looking at the outer skin of the cable, observing the internal structure, measuring the size of the copper core, understanding the transmission performance, and considering the application scenarios, it is possible to accurately distinguish different levels of cable.