Figure 4 Coaxial Cable
Coaxial Cable is a type of cable that have a single copper conductor at its center. A plastic layer provides insulation between the center conductor and a braided metal shield. The metal shield helps to block any outside interference from fluorescent lights, motors, and other computers. The cons of this coaxial cable is difficult to install, but it has highly resistant to signal interference. When we compare the twisted pair cable with this coaxial cable, the coaxial cable can support greater cable lengths between network devices than twisted pair cable.
Coaxial Cable is a type of cable that have a single copper conductor at its center. A plastic layer provides insulation between the center conductor and a braided metal shield. The metal shield helps to block any outside interference from fluorescent lights, motors, and other computers. The cons of this coaxial cable is difficult to install, but it has highly resistant to signal interference. When we compare the twisted pair cable with this coaxial cable, the coaxial cable can support greater cable lengths between network devices than twisted pair cable.
There have two types of coaxial cabling :
- Thin Coaxial
- Thick Coaxial
Thin Coaxial Cable
Figure 5 Thin Coaxial Cable (10BASE2)
10BASE2 is a variant of Ethernet that uses thin coaxial cable, terminated with BNC connectors. The name 10BASE2 is derived from several characteristics of the physical medium. The 10 comes from the maximum transmission speed of 10Mbit/s (Millions of bits per second). The BASE stands for baseband signalling, and the 2 refers to the maximum segment length of 200 meters but in facts it can only run up to 185 meters. Thin coaxial cable is usually been selected to use in school networks, especially bus networks.
Thick Coaxial Cable
Figure 6 Thick Coaxial Cable (10BASE5)
10BASE5 was the originally commercially available variant of Ethernet. 10BASE5 refers to the specifications for the thick coaxial cable that carrying the Ethernet signals. The 5 refers to the maximum segment length of 500 meters but in practical less than that. The thick coaxial cable has an extra protective plastic cover that can helps to keep the moisture away from the center conductor. This makes the thick coaxial cable become a great choice when needed to run longer lengths in a linear bus network. But, it does not easily bend and it is hard to install.
Coaxial Cable Connectors
Figure 7 BNC connector
Bayone-Neill-Concelman (BNC) connector is the most common type of connector that used with the coaxial cables. Different types of adapters are available for BNC connectors, including T-connector, barrel connector, and terminator. Always use the BNC connectors that crimp rather than screw onto a cable so that it can help to avoid the problems with your network.
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