- the process of transferring digital information between two or more points.
Data communication
- an interconnected set of independent computers.
Computer Networks
4 fundaments characteristics of Data Communication
Delivery
Accuracy
Timeliness
Jitter
5 components of Data Communication
Message
Sender
Receiver
Medium
Protocol
end nodes
Terminals, Workstations, Computers, and other devices
for transmitting data and control signals
Transmission Media
intermediate devices for routing data from source to destination
Network electronics
to control data transmission
Software
Standards to ensure interoperability between different equipment made by different vendors
Network Architecture Standards
These transmit electronic or light signals and consist of different media.
Transmission Media
Serve a variety of functions including routing or switching data from source to destination or for providing the interface between different transmission media or different communication protocols.
Network electronic devices
implements techniques and protocols which define the rules and end procedures for initiating and terminating data transfers, interpreting how data is represented and transmitted and how errors are handled.
Software in end nodes
performs other functions to ensure data is transmitted from source to destination.
Software in the network electronics
LAN
Local Area Network
MAN
Metropolitan Area Network
WAN
Wide Area Network
- the direction of the data between two nodes is in one way only
Simplex
- allows data to traverse in both directions but only in one direction at a time (not simultaneous)
Half Duplex
- allows data to go in opposite directions at the same time.
Full Duplex
- a technique used in networks to reduce the complexity of making software communicate.
Layering
