describe the following transmittion medium:coaxial cable
fibre optic cable
twisted pair cable
Since this is not my area of expertise, I searched Google under the key words "fibre optic cable" to get this:
http://www.google.com/search?client=safari&rls=en&q=fibre+optic+cable&ie=UTF-8&oe=UTF-8
You can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
1. Coaxial Cable: A coaxial cable is a type of transmission medium that is commonly used to transmit audio, video, and data signals. It consists of a central conductor, which carries the signal, surrounded by an insulating layer, a metal shield, and an outer protective sheath. The central conductor and the metal shield are separated by an insulating material, such as foam or air. Coaxial cables provide good signal quality, high bandwidth, and are resistant to electrical interference.
To use a coaxial cable, you would typically connect one end of the cable to the source of the signal (such as a cable TV box or a modem), and the other end to the destination device (such as a TV or a computer).
2. Fiber Optic Cable: A fiber optic cable is another type of transmission medium that uses light pulses to transmit data. It consists of a very thin strand of glass or plastic called an optical fiber, which is surrounded by a protective coating. Light signals are transmitted through the fiber by reflecting off the walls of the fiber, using a principle known as total internal reflection.
Fiber optic cables offer several advantages over other types of cables. They can transmit large amounts of data over long distances without any loss in signal quality. They are immune to electromagnetic interference and can support very high bandwidths. To use a fiber optic cable, you need to connect it to a transmitter at one end (which converts electrical signals into light signals) and a receiver at the other end (which converts light signals back into electrical signals).
3. Twisted Pair Cable: Twisted pair cable is a type of transmission medium that is commonly used in Ethernet networks and telephone systems. It consists of two insulated copper wires twisted together in a helical pattern. The twisting helps to reduce electrical interference and crosstalk between adjacent wire pairs.
Twisted pair cables can be either shielded or unshielded. Unshielded twisted pair (UTP) cables are the most common and affordable type of twisted pair cables. They are used for short to medium distance communications. Shielded twisted pair (STP) cables have an additional metal shield around the wire pairs, providing better protection against electromagnetic interference. They are commonly used in environments with high levels of electrical noise.
To use a twisted pair cable, you would typically connect one end of the cable to a network device (such as a computer or a switch) using an RJ-45 connector. The other end would be connected to a corresponding device or a network outlet.