Communication Channels and Internet Access

Overview of Communication Channels

Overview of Communication Channels and Internet Access slide presentation

  • Communication channels and internet access encompass the fundamental hardware, transmission media, and connections required to link devices and enable data transfer across networks.

  • Core topics in communication channels and internet access include:

    • Definition and role of a network communication channel
    • Wired communication channels (Cables)
    • Wireless communication channels
    • Communication media properties and structures
    • Mobile broadband technologies (3G/4G)

Definition of a Communication Channel

  • Communications Channel (Media): A physical or wireless medium that establishes a link between network devices.

  • Primary Function: Transfers data to and/or from devices across a network connection.

Cable Communication Channels (Wired Media)

  • Unshielded Twisted Pair (UTP):

    • Standard network cable and port interface.
    • Primary media used to connect devices within a network.

  • Coaxial Cable:

    • Traditionally used for cable television (Cable TV) connections.
    • Utilized in older network cabling infrastructure.

  • Fibre Optic Cable:

    • Provides exceptionally fast transmission speeds.
    • Capable of transmitting data across long distances without significant degradation.
    • Transmits network communication signals using pulses of light.

Fibre Optic Cable Structure and Mechanics

  • Transmission Method: Uses light pulses traveling through glass media rather than electrical currents over copper.

  • Speed Performance: Classified as a fast, high-bandwidth communication channel.

  • Material Composition: Constructed out of thin glass strands.

  • Physical Component Layers:

    • Glass Core: The central inner channel made of glass through which the light signals propagate.
    • Cladding: The optical layer surrounding the core that reflects light back into the glass core, preventing signal loss.
    • Protective Outer Jacket: The external sheath protecting the optical cladding and glass core from physical damage and environmental factors.

Wireless Communication Channels (Wi-Fi)

  • Wireless Data Transmission: Utilizes radio signals to transmit and receive data over the air, eliminating the requirement for physical cable connections.

  • Wireless Hardware & Connections:

    • Wireless Adapter: Device requirement that allows computers and hardware to connect to a Wi-Fi network.
    • Wireless Router:
    • Receives radio signals from local network devices.
    • Translates radio signals into network data that devices can interpret.
    • Connects users to the internet via a wireless or wired connection.