Communication channel
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A communication channel refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer
Different types of physical transmission media supporting communication channels
Network topology
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Network topology is the arrangement of the elements of a communication network. Network topology can be used to define or describe the arrangement of various types of telecommunication networks, inclu
Fiber-optic cables are used to transmit light from one computer/network node to another.
Personal computers are very often connected to networks using wireless links.
An ATM network interface in the form of an accessory card. A lot of network interfaces are built-in.
A typical home or small office router showing the ADSL telephone line and Ethernet network cable connections