Explain the difference between fiber optic cable, network cable and cable 2


Explain the difference between fiber optic cable, network cable and cable 2

2. Twisted pair

Twisted pair is a kind of flexible communication cable, which contains a pair of insulated copper wires. It is characterized by low price, so it is widely used, such as our common telephone lines. According to the difference of maximum transmission rate, twisted pair can be divided into 3 types, 5 types and super 5 types. The rate of category 3 twisted pair is 10mb/s, category 5 can reach 100mb/s, and category 5 is up to 155mb/s, which can be suitable for the needs of future multimedia data transmission, so it is recommended to use category 5 or even category 5 double Stranded wire. Twisted pair can also be divided into shielded twisted pair (stp) and unshielded twisted pair (utp). Although the speed of stp twisted pair is lower (only 4mb/s), it has stronger anti-interference than utp twisted pair, so the price is much more expensive. Now this kind of twisted pair is cheaper by a few yuan per meter, maybe it is expensive One meter can be bought for more than ten yuan. In contrast, the price of utp twisted pair is generally about one yuan per meter, which is relatively low. In addition, the popular names of commonly used 10m and 100m unshielded twisted pairs are 10base-t and 100base-t, which you can often see on the market. The rj45 crystal head is used in conjunction with the twisted pair cable to make the joint between the twisted pair cable and the rj45 interface of the network card. The quality of the connector is directly related to the stability of the entire network and cannot be ignored.

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3. Coaxial cable

      Coaxial cable is a type of transmission medium that many friends are familiar with. It is a cable with a central copper conductor wrapped in layers of insulated wires. Its biggest feature is its good anti-interference ability, stable data transmission, and low price. , So it was once widely used, such as closed-circuit television lines. However, coaxial cables used more in the past, mainly because the cost of the bus structure network composed of coaxial cables is lower, but the damage of a single cable may cause the entire network to be paralyzed and maintenance is difficult. This is its biggest drawback. Coaxial cables in Ethernet applications are mainly divided into thick coaxial cables (10base5) and thin coaxial cables (10base2). Now thick coaxial cables are not used much, and there are still some markets for thin coaxial cables. Thin coaxial cables are generally sold at a few yuan per meter in the market, which is not too expensive. In addition, the coaxial cable is used to connect with the bnc head. The coaxial cable sold on the market is generally the finished product that has been connected with the bnc head. You can directly choose it.

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