If we just gets the people don't know what you know about cable, these two years we, flew to improve Internet connection, because there is the emergence of the cable, we, to guarantee the electricity because of the cable, then we can go online at home, and there was a cable, do you know what is the difference between the three products?
1. Fiber optic cable
Fiber optic cable is a new generation of transmission medium. Compared with copper medium, fiber optic has been greatly improved in security, reliability and network performance. In addition, the bandwidth of optical fiber transmission is much greater than that of copper cable, and the maximum connection distance it supports is more than two kilometers, which is the inevitable choice for the establishment of a larger network. As a result of fiber optic cable has fight electromagnetism interference the gender is good, confidential sex is strong, speed is fast, transmission capacity is big wait for an advantage, so its price is relatively expensive also, use rarely in domestic use situation.
Two different types of optical fibers are commonly used, single-mode and multimode (a "mode" is a beam of light that enters a fiber at an Angle). Multimode optical fiber is generally used in the same office building or relatively close to the area within the network connection. Single-mode optical fibers deliver higher quality data over longer distances and are often used to connect between office buildings or to more geographically dispersed networks. If the use of optical fiber cable as the network transmission medium, also need to increase the optical end transceiver and other equipment, so the cost of investment is greater, less used in general applications.
2. The twisted-pair cable
Twisted pair is a kind of flexible communication cable, including pairs of insulated copper wire, it is characterized by cheap price, so it is widely used, such as our common telephone lines. According to the maximum transmission rate, twisted pair can be divided into three categories, five categories and super five categories.
The speed of category 3 twisted pair cables is 10mb/s, and that of category 5 can reach 100mb/s, while that of category 5 is over 155mb/s, which can meet the demand of multimedia data transmission in the future. Therefore, it is recommended to use category 5 or even category 5 twisted pair cables. Twisted pair can also be classified as shielded twisted pair (STP) and unshielded twisted pair (utp). Although the STP twisted pair has a low rate (only 4mb/s), it is more robust than utp twisted pair
Utp twisted pair cables, by contrast, typically cost about $1 a meter and are relatively inexpensive. In addition, the commonly used 10m and 100m unshielded twisted pair are called 10base-t and 100base-t, which you can often see in the market. And twisted pair supporting the use of rj45 crystal head, used for the production of twisted pair and network card rj45 interface joint, its quality is directly related to the stability of the entire network, can not be ignored.
3. Coaxial cable
Coaxial cable is a kind of transmission medium that a lot of friends are familiar with, it is the cable line that wraps central copper conductor by layer of insulation line, its biggest characteristic is anti-interference ability is good, transmission data is stable, and the price is cheap also, be used extensively for a time so, be like cable of closed-circuit television. However, coaxial cable is widely used in the past, mainly because the cost of the bus structure network composed of coaxial cable is low, but the damage of a single cable may lead to the paralysis of the entire network, and it is difficult to maintain, which is its biggest drawback.