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COMMUNICATION SYSTEM AND COMPUTER NETWORK - Coggle Diagram
COMMUNICATION SYSTEM AND COMPUTER NETWORK
What are computer communications?
Process in which two or more computers or devices transfer data, instructions, and information
What is needed for successful communications?
Communications channel
Communications device — connects the communications channel to the receiving device
Communications device
Receiving device — accepts transmission of data, instructions, or information
Sending device
Uses of Computer Communications
What are wireless messaging services?
Text messaging allows users to send and receive short text messages on a phone or other mobile device
Picture/video messaging allows users to send graphics, pictures, video clips, sound files, and short text messages
Wireless instant messaging allows wireless mobile devices to exchange messages
What is a global positioning system (GPS)?
that accept and analyze signals sent by satellites
in order to determine the receiver’s geographic location.
Navigation system that consists of one or more earth-based receivers
What are collaboration and groupware?
Collaboration is working with other users connected to a server
Groupware is software that allows people work together and share information
voice mail
Voice mail is voice message converted to digital form
web services
Web services describe standardized software that enables programmers to create applications that communicate with other remote computers over the Internet or on an internal business network
What is a network?
Collection of computers and devices connected via communications devices and transmission media
What is a wide area network (WAN)?
Network that covers large geographic area using many types of media
Internet is world’s largest WAN
What is a peer-to-peer network?
Simple network that connects fewer than 10 computers
Each computer, or peer, has equal capabilities
What is a star network?
All devices connect to a central device (hub or switch)
All data transferred from one computer to another passes through hub or switch
What is an intranet?
Internal network that uses Internet technologies
Makes information accessible to employees
Typically includes connection to Internet
Extranet allows customers or suppliers to access part of company’s intranet
What is Bluetooth?
Short-range radio waves transmit data between Bluetooth devices
What is communications software?
Programs that provide an interface for users to communicate with one another
Programs that help users manage transmission of data, instructions, and information
Programs that help users establish connection to Internet, other network, or another computer
What is the public switched telephone network (PSTN)?
Worldwide telephone system that handles voice-oriented telephone calls
What is a dial-up line?
Temporary connection using telephone line for communications
Costs no more than making regular call
Computers at any two locations can establish a connection using modems and telephone network
ISDN and DSL modems
Communications devices that send and receive digital ISDN and DSL signals
Usually external devices in which one end connects to a telephone line and the other end connects to a port on the system unit