19-05-2014, 02:15 PM
DATA COMMUNICATION
DATA COMMUNICATION[.pdf (Size: 292.92 KB / Downloads: 11)
The transfer of data from one machine to another machine such that the sender and
receiver both interpret the data correctly is called data communication. Data communication
is concerned with the transmission of digital data. This transfer of data is in the form of bits 0
and 1. Some form of transmission medium is necessary for this exchange of data.
Protocol:
A protocol is a set of rules that control the process of data communication.
When two or more devices exchange data, there must be agreements on how this
exchange will take place. E.g., at what speed will the sender transmit data, in which
language, what if errors take place during the process o data transmission, and how
these errors take place during the process of data transmission, and how these errors
will be corrected, how to know that all the data has been transmitted. All these issues
are handled by a set of rules called the protocol.
Distributed Processing:
Distributed processing means that processing will
occur on more than one processor. These multiple
computers communicate with each other through a
computer network. In distributed processing, a task is
divided among many computers. Thus, a single
computer is not responsible for all the processing, but
each separate computer handles a part of processing
job.
Metropolitan Area Network (MAN):
A metropolitan area network (MAN) is a network that
interconnects users with computer resources in a
geographic area or region larger than that covered by
even a large local area network (LAN) but smaller than
the area covered by a wide area network (WAN). The
term is applied to the interconnection of networks in a
city into a single larger network (which may then also
offer efficient connection to a wide area network). It is
also used to mean the interconnection of several local
area networks by bridging them with backbone lines.
The latter usage is also sometimes referred to as a
campus network.
DATA COMMUNICATION[.pdf (Size: 292.92 KB / Downloads: 11)
The transfer of data from one machine to another machine such that the sender and
receiver both interpret the data correctly is called data communication. Data communication
is concerned with the transmission of digital data. This transfer of data is in the form of bits 0
and 1. Some form of transmission medium is necessary for this exchange of data.
Protocol:
A protocol is a set of rules that control the process of data communication.
When two or more devices exchange data, there must be agreements on how this
exchange will take place. E.g., at what speed will the sender transmit data, in which
language, what if errors take place during the process o data transmission, and how
these errors take place during the process of data transmission, and how these errors
will be corrected, how to know that all the data has been transmitted. All these issues
are handled by a set of rules called the protocol.
Distributed Processing:
Distributed processing means that processing will
occur on more than one processor. These multiple
computers communicate with each other through a
computer network. In distributed processing, a task is
divided among many computers. Thus, a single
computer is not responsible for all the processing, but
each separate computer handles a part of processing
job.
Metropolitan Area Network (MAN):
A metropolitan area network (MAN) is a network that
interconnects users with computer resources in a
geographic area or region larger than that covered by
even a large local area network (LAN) but smaller than
the area covered by a wide area network (WAN). The
term is applied to the interconnection of networks in a
city into a single larger network (which may then also
offer efficient connection to a wide area network). It is
also used to mean the interconnection of several local
area networks by bridging them with backbone lines.
The latter usage is also sometimes referred to as a
campus network.