INTERNET TECHNOLOGY WHAT IS NETWORK ?           A network is a collection of computers and devices connected together via communications devices and transmission media. COMMUNICATION DEVICE AND TRANSMISSION MEDIA    What is communication media ? Communications device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device. Types of communication devices Dial up modem   Wireless modem Network card Digital modem(SDN,DSL and cable modem) Wireless access point Router Switch Hub what is transmission media ? Materials or substances capable of carrying one or more signals in a communications channel. Two types of transmission media: 1.Physical transmission media/Guided media/Wired •Twisted-Pair Cable, Coaxial Cable, Fiber-Optic Cable. 2.Wireless