what are coaxial cables.fibre optic cables and twisted pair cables?
What kind of HELP do you need? You need to be specific when asking questions here.
If all you do is post your entire assignment, nothing will happen since no one here will do your work for you. But if you are specific about what you don't understand about the assignment or exactly what help you need, someone might be able to assist you.
For these kinds of questions, I'd go to http://www.answers.com and enter each term to find many meanings.
Coaxial cables, fiber optic cables, and twisted pair cables are all types of networking cables used to transmit data. Let me explain each of them in detail:
1. Coaxial Cables: Coaxial cables consist of a central conductor, surrounded by an insulating layer, a metallic shield, and an outer insulating layer. The central conductor carries the data signals, while the metallic shield acts as a barrier against external interference. Coaxial cables are commonly used in cable TV connections, networking applications, and high-speed internet connections. They provide a relatively high bandwidth and are capable of supporting longer cable runs.
2. Fiber Optic Cables: Fiber optic cables use thin strands of glass or plastic fibers to transmit data as pulses of light. The inner core of the fiber carries the light signals, while the outer cladding reflects the light back into the core to ensure minimal signal loss. Fiber optic cables offer several advantages such as high bandwidth, immunity to electromagnetic interference, and long-distance transmission capabilities. They are commonly used in telecommunications networks, internet backbone connections, and high-speed data transmission applications.
3. Twisted Pair Cables: Twisted pair cables are made up of pairs of insulated copper wires twisted together. There are two main types: Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP). UTP cables are widely used in Ethernet networks and telephone connections. They are less expensive, flexible, and easier to install. STP cables have additional shielding to protect against electromagnetic interference, making them suitable for environments with high electrical noise. Twisted pair cables provide comparatively lower bandwidth but are suitable for shorter distances.
To summarize, coaxial cables are commonly used for TV and networking, fiber optic cables are known for high-speed data transmission and immunity to interference, and twisted pair cables are widely used in Ethernet networks and telephone connections.