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29/06/2015IT016 Dr.Suresh Sankaranarayanan*IT016Computer
NetworksIntroduction to Networking
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Textbook Used
Data communication and Networking by Behrouz A. Forouzan, 4th
Edition
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Outline Data
communication? Data Communication Components Network Criteria Data
Flow Types of Network Connections
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Data communication
?
The term telecommunication means communication at a distance.The
word data refers to information presented in whatever form is
agreed upon by the parties creating and using the data. Data
communications are the exchange of data between two devices via
some form of transmission medium such as a wire cable.
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Data communication
Components
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Network Criteria For
a network to work efficiently and effectively, following criteria's
must be met . a. Performance b. Reliability c. Security Performance
of a network is governed by the following: a. Number of users b.
Transmission media c. Hardware d. Software Reliability of Network
is governed by Frequency of failure, Recovery time of a network
after failure, catastrophe Security of Network is governed by
unauthorized access, Viruses
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Data Flow The way
data flows from sender to receiver can be categorized into Simplex,
Half Duplex, Full duplex
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Networks We have seen
till now as what communication is and the components involved.In
communication how data flows.Summarizing , a network is a set of
devices (often referred to as nodes) connected by communication
links. A node can be a computer, printer, or any other device
capable of sending and/or receiving data generated by other nodes
on the network.
IT016 Dr.Suresh Sankaranarayanan
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29/06/2015IT016 Dr.Suresh Sankaranarayanan*Types of Network
Connections Point to Point and Multipoint
IT016 Dr.Suresh Sankaranarayanan
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