Computer network A collection of computing devices that are connected in various ways in order to communicate and share resources. Usually, the connections between computers in a network are made using physical wires or cables. The generic term node or host refers to any device on a network data transfer rate. The speed with which data is moved from one place on a network to another Data transfer rate is a key issue in computer networks. Two computers are said to be connected if they interchange information.
Components of Network
The
following are components of network:
1)
Sender: device which send the data and
information.
2)
Receiver: device which receive the data.
3)
Communication channel: medium by using
which data transfer is done between sender and receiver.
4)
Protocols: set of rules and regulations.
Computer
Network Criteria
1)
PERFORMANCE: can be measured in many ways:
a) Transit Time: amount if time required
for a message to travel from one device to another device.
b) Response Time: time elapsed between
enquiry and response.
2)
RELIABILITY: it decide the frequency at which network failure take place.
3)
SECURITY: refer to protection of data from unauthorized users or access.
Computer
networks have opened up an entire frontier in the world of
computing called the client/server model.
Client Server Interaction.
Types of
Connection
Point to point connection:
it provides a dedicated link between two devices.
Multipoint connection:
in this more than two devices share a single link.
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