Mrs Telfer's Introduction To Networks

Explanation
A network is a collection of computers and devices connected by communications channels. This means that the computers and devices within a network are linked together through various communication channels, such as wired or wireless connections, allowing them to share information and resources.

Explanation
The purpose of networks is to facilitate communication between devices, allowing them to share hardware resources, files, data, and information. Networks enable devices to connect and interact with each other, enabling efficient communication and collaboration. Sharing software is also a purpose of networks, as it allows multiple devices to access and use the same software applications or programs.

Explanation
The classifications of networks include wired technologies, functional relationship (network architecture), connection method, wireless technologies, and network topology. Wired technologies refer to networks that use physical cables to transmit data, while wireless technologies use wireless signals. Functional relationship (network architecture) refers to the way network devices are organized and connected. Connection method refers to the way devices are connected to the network, such as Ethernet or Wi-Fi. Network topology refers to the physical or logical layout of the network, such as star, bus, or mesh.

Explanation
Twisted pair wire is actually one of the most widely used mediums for telecommunication. It is commonly used for telephone lines and local area networks (LANs). It consists of two insulated copper wires twisted together to reduce interference and crosstalk. Twisted pair wire is cost-effective, easy to install, and provides reliable communication over short to medium distances. Therefore, the given statement is false.

Explanation
Coaxial cable is indeed widely used for cable television systems, office buildings, and local area networks. It is a type of cable that consists of a central conductor, surrounded by an insulating layer, a metallic shield, and an outer insulating layer. This design allows for efficient transmission of high-frequency signals with minimal interference. Due to its superior performance in carrying television and data signals over long distances, coaxial cable has become the preferred choice for these applications. Therefore, the statement is true.

Explanation
Fiber-optic cables are not affected by electromagnetic radiation. Unlike copper cables, which can experience interference from electromagnetic radiation, fiber-optic cables use light signals to transmit data. This means that they are immune to electromagnetic interference and provide a more reliable and secure transmission of information.

Explanation
The given statement describes how people can communicate efficiently and easily using various methods such as email, instant messaging, chat rooms, telephone, video telephone calls, and video conferencing. This process of enabling and making communication easier is known as facilitating communications.

Explanation
The correct answer is ethernet and optical fiber. Ethernet is a widely used network connection method that allows devices to connect and communicate with each other over a local area network (LAN). Optical fiber, on the other hand, is a high-speed transmission medium that uses thin strands of glass or plastic to transmit data as pulses of light. It is known for its high bandwidth and long-distance capabilities, making it ideal for long-haul communication networks. Both ethernet and optical fiber are commonly used in modern networking to provide reliable and fast connections.