What are the methods for purchasing network cables? How to ensure the quality of Internet access? Let's take a look at the following steps:

1. Identification: The identification of the three-category line is "CAT3", the identification of the fifth-category line is "CAT5", the identification of the super-category-five line is "CAT5E", and the identification of the sixth-category line is "CAT6".

2. Feeling in hand: High-quality network cables generally use copper wire as the wire core, which is relatively soft, while poor-quality wires are added with other metal elements, which are relatively hard, not easy to bend, and easy to break during use.

3. Cut with a knife: remove the plastic sheath to expose the core wire, the white core wire is gray, and the fake is usually pure white or the color is not obvious. A good network cable has a moderate winding density and the direction is counterclockwise.

4. Burning with fire: Test at high temperature of 35℃ to 40℃, the rubber on the outside of the genuine network cable will not become soft, the rubber on the outside of the real network cable is flame retardant, while some fake ones are not.