LESSON2
A MODERN DEFINITION OF DATA COMMUNICATIONS
Data Communications – the transmission of encoded data and information in a medium-specific format between two or more nodes, people, businesses, or entities.
Data communications can also mean moving information from point A to multiple points B through methods known as multicast and broadcast. In general, multicast involves transmitting information to groups of computers on a network and broadcast means transmitting to all computers on a network.
Data communications as the transmission of encoded data and information in a medium-specific format between two or more nodes, people, business, or entities.
For successful communications, you need the following:
1. A Sending device that initiates an instruction to transmit data, instructions, or information.
2. A communications device that connects the sending device to a communications channel.
3. A communications channel, or transmission media on which the data, instructions, or information travel.
4. A communications device that connects the communications channel to a receiving device.
5. A receiving device that accepts the transmission of data, instructions, or information.
All types of computers and mobile devices serve as sending and receiving devices in a communications system. One type of communications device that connects a communications channel to a sending or receiving device such as a computer is a modem.
USES OF DATA COMMUNICATIONS
Communications Type
Brief Description
Blogs
Time-stamped articles on a network that reflect the author’s interests, opinions, and personality.
Chat Rooms
Real-time typed conversation among two or more people that takes place on a computer connected to a network that also may allow the exchange of messages, photos, files, audio, and video.
E-Mail
Transmission of messages and files via a computer network
Fax
Transmits and receives documents over telephone lines
FTP
Internet standard that permits users to upload and download
Data Communications – the transmission of encoded data and information in a medium-specific format between two or more nodes, people, businesses, or entities.
Data communications can also mean moving information from point A to multiple points B through methods known as multicast and broadcast. In general, multicast involves transmitting information to groups of computers on a network and broadcast means transmitting to all computers on a network.
Data communications as the transmission of encoded data and information in a medium-specific format between two or more nodes, people, business, or entities.
For successful communications, you need the following:
1. A Sending device that initiates an instruction to transmit data, instructions, or information.
2. A communications device that connects the sending device to a communications channel.
3. A communications channel, or transmission media on which the data, instructions, or information travel.
4. A communications device that connects the communications channel to a receiving device.
5. A receiving device that accepts the transmission of data, instructions, or information.
All types of computers and mobile devices serve as sending and receiving devices in a communications system. One type of communications device that connects a communications channel to a sending or receiving device such as a computer is a modem.
USES OF DATA COMMUNICATIONS
Communications Type
Brief Description
Blogs
Time-stamped articles on a network that reflect the author’s interests, opinions, and personality.
Chat Rooms
Real-time typed conversation among two or more people that takes place on a computer connected to a network that also may allow the exchange of messages, photos, files, audio, and video.
Transmission of messages and files via a computer network
Fax
Transmits and receives documents over telephone lines
FTP
Internet standard that permits users to upload and download