COMMUNICATION DEVICE
Communication device is a communications device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device.
Types
- Dial-up modem is a communications device that can covert digital signals to analog signals and analog signals to digital signals, so that data can travel along an analog telephone line.
- Digital modem is a communications device that sends and receive data and information to and from a digital line.
- Wireless modem is a communication that uses the cell phone network to connect to the internet wirelessly from a notebook computer, a smart phone, or other mobile phone.
- Network card is a communications device that enables a computer or device that does not have built-in networking capability to access a network.
- Wireless access point is a central communications device that allows computers and devices to transfer data wirelessly.
- Router is a communications device that connects multiple computers or other routers together and transmits data.
- Hub is a connection device that allows multiple connection to the network.
- Switch is a connection device similar to hub but more sophisticated.
TRANSMISSION MEDIA
Transmission media is materials or substances capable of carrying one or more signals in a communication channel.
TYPES
Physical transmission media such as fiber optic that uses glass or plastic fiber to carry light signals.Twisted-pair cable consists of one or more twisted-pair wires bundled together.Coaxial cable is a single copper wire surrounded by at least three layers which is an insulating material, a woven or braided metal and a plastic outer coating.
Twisted-pair cable
Wireless transmission media such as microwave that provide a high-speed signal transmission. Communications satellite is a space station that receives microwave signals from an earth-based station.
No comments:
Post a Comment