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INTERNET TECHNOLOGY, Communication devices: A communications device is…

- - - - Coaxial Cable: Consists of a single copper wire surrounded by at least three layers: an insulting material, a woven or braided metal and a plastic outer coating.
        
        Fiber-Optic Cable: The core of a fiber-optic cable consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals.
  - - - Broadcast Radio: Is a wireless transmission medium that uses radio waves to send signals through the air. It can operate over long distances and short distances.
        
        Cellular Radio: Is a form of broadcast radio that is used widely for mobile communications, specifically wireless modems and cell phones.
        
        Microwaves: Provides high-speed signal transmission using microwave frequencies.
        
        Communication Satellite: Is a space station that receives microwave signals from an earth-based station
- - - - Sharing data: any authorized computer user can access data and information stored on other computers on the network.
  - - - ii. A fault with the network server can cause difficulties with the organization.
        
        iii. Networks can be vulnerable to security breaches and cyberattacks.
- - - - Basic Hardware Components of Network: NIC, Computer, Hubs/switches/routers, Transmission media, Repeater, Wireless Access Point
        
        Communications: Process in which two or more computers or devices transfer data, instructions and information is known as digital communications
- - - - Router: a router is a communication device that connects multiple computers or routers together and transmits data to its correct destination on a network.
        
        Hub/Switches: A hub or switch is a device that provides a central point for cables in a network