Network Cabling and Wireless Networking, Lecture notes of Computer Systems Networking and Telecommunications

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Lesson 2

and Wireless Networking

• Wi-Fi (Wireless Fidelity): A technology that allows devices to connect to a network wirelessly.

• Bluetooth: A short-range wireless communication technology.

• Cellular Networks (3G, 4G, 5G): Networks that allow mobile devices to connect to the Internet.

1. Copper cabling uses electrical signals to transmit data between devices.

Copper cabling is a fundamental element in network infrastructure. It consists of insulated copper wires used to

transmit data signals between network devices. There are two main types of copper cabling used in networking:

i. Coaxial cable

Coaxial cable, also known as coax, is a type of electrical cable designed to transmit high-frequency electrical signals

with minimal losses. It achieves this through its unique layered structure:

• Inner Conductor: This is the core of the cable, typically a solid or stranded copper wire that carries the

signal.

• Dielectric Insulator: A layer of insulating material, often plastic or foam, surrounds the inner conductor

and separates it from the outer conductor. This insulator prevents the inner conductor from directly touching

applications

• Cable Television (CATV): Coax cables were traditionally used to deliver cable TV signals to homes.

• Broadband Internet: Early internet connections often relied on coax for data transmission.

• Satellite Television: Coax cables are used to connect satellite dishes to receivers.

• Radio Frequency (RF) Applications: Coaxial cables are used for various RF applications, including

connecting antennas to transmitters and receivers.

• Computer Networks: While less common today, coax was once used in certain types of computer

networks.