A coaxial cable has an internal conductor that runs down the middle of the cable. The conductor is surrounded by a layer of insulation which is then surrounded by another carrying conductor shield, which makes this type of cable resistant to external obstruction. This type of cable comes in two types – thinnet and thicknet. Each type has a maximum transmission speed of 10 Mbps. Coaxial cables were previously used in computer networks, but are now replaced by twisted pair cables.
Data cables has four pairs of wires. These wires are twisted almost to each other to reduce crosstalk and external interference. This type of cabling is common in current LANs. Data cables can be used for telephone and network cables.
Fiber optic cables possess a center glass core surrounded by multiple layers of protective materials. They avoid electrical obstruction by transmitting light instead of electronic signals, making them perfect for environments with large amounts of electrical interference. Fiber optic cables have become the standard for connecting networks across buildings because of their resistance to moisture and lighting.