It is a new generation of fiber-optic cable transmission medium, compared to copper media, optical fiber whether in security, reliability or network performance has greatly improved. In addition, the optical fiber transmission bandwidth well beyond copper cable, and the maximum range of its support for two kilometers, is the formation of large-scale network of the inevitable choice. Since the optical fiber cable has good resistance to electromagnetic interference, confidentiality, speed, large transmission capacity, etc., so its price is also more expensive, rarely used in domestic situations. Currently more common There are two different types of fiber, which are single-mode fiber and multimode fiber (so-called "model" refers to a certain angle of the beam of light into the fiber). Multi-mode fiber is generally used for network connections to the same office building or from the relatively close area. Single-mode fiber and a higher quality of the data transfer, transmission length, are often used to connect between the wider geographically dispersed offices, or network. If you use a fiber optic cable network as a transmission medium, the need to increase the light end of the transceiver and other equipment, so the greater the cost of inputs, in general, less used applications.
Coaxial cable is more familiar to many of my friends for a class of transmission medium, which is composed of layers of insulated wire wrapped around a central copper conductor cable, and its most prominent feature is a good anti-interference ability, stable transmission of data, but the price is cheap Therefore once widely used, such as closed circuit television lines. However, before the coaxial cable used more, mainly because of lower network coaxial cable bus structure costs, but damage to a single cable may cause paralysis of the entire network, it is difficult to maintain, which is its biggest flaw. Ethernet applications, coaxial cable is divided into a thick coaxial cable (10base5) and thin coaxial cable (10base2) two kinds. Now thick coaxial cable used much, and some thin coaxial cable market. Thin coaxial cable is generally the market price a few yuan a meter, not too expensive. In addition, the coaxial cable is used and connected to the bnc head, sold on the market are generally coaxial cable and bnc connector has a good finished product, we can be directly used.