What is the network cable connection? What are the categories of network cables?

Network cable connection refers to the method of connecting a network cable to a device or network port. There are several common network cable connection methods: Straight-Through Connection (Straight-Through): Straight-Through Connection is the most common network cable connection method, which connects the network cable at one end to the other end according to the same standard, i.e., line 1 at one end is connected to line 1 at the other end, line 2 is connected to line 2, and so on. This type of connection is often used to connect a computer to a switch, router, or to connect two computers directly. Crossover: A crossover connection is a special type of network cable that is used to connect two computers or two network devices directly without the use of a switch or router. In a crossover connection, line 1 on the transmitting end is connected to line 3 on the receiving end, and line 2 on the transmitting end is connected to line 6 on the receiving end for normal data transmission. Auto MDI-X: Auto cross-connect is a technology that automatically detects and adapts to network cable connections. Some modern network equipments are equipped with auto-cross-connection function, which can automatically adjust the line connection according to the type of connected devices and requirements, without the need to manually replace the straight-through or cross-wire. As for the categorization of network cables, the common network cables are mainly as follows: Category 5e (Cat5e): Cat5e is a commonly used network cable that supports transmission frequencies up to 100 MHz and is suitable for Fast Ethernet and Gigabit Ethernet networks.Category 6 ( Cat6): Cat6 is a high-performance network cable that supports transmission frequencies up to 250 MHz and provides improved interference immunity and signal quality for Gigabit Ethernet and 10 Gigabit Ethernet networks. category 6a (Cat6a): Cat6a is an enhanced version of Cat6 that supports transmission frequencies up to 500 MHz and provides better signal quality. frequencies up to 500 MHz, providing better interference immunity and longer transmission distances for high-speed data transmission and 10 Gigabit Ethernet networks.Category 7 (Cat7): Cat7 is a shielded network cable for high-speed data transmission, supporting transmission frequencies up to 600 MHz, providing better damping and interference immunity for 10 Gigabit Ethernet and higher speed networks. high-speed networks. In addition to the above common classifications, there are some other types of network cables, such as fiber optic network cable (Fiber Optic) for long distance transmission and high speed networks, and coaxial cable (Coaxial) for transmission of TV signals and cable networks. Choosing the right network cable should be based on a combination of factors such as network speed requirements, transmission distance, anti-interference needs and budget.

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