INTRODUCTION OF NETWORK

Communication Model

Data communications refers to the transmission of this digital data between two or more computersandacomputernetworkordatanetworkisatelecommunicationsnetworkthatallows computers to exchange data. The physical connection between networked computing devices is established using either cable media or wireless media. The best-known computer network is theInternet.

Data communication is a combination of two techniques:

• Telecommunications
  communication over a distance by cable, telegraph, telephone, or broadcasting.
• Data Processing
  a series of operations on data, especially by a computer, to retrieve, transform, or classify information.

Component of Communication Model :

• Sender : Generates data signal that must be transmitted, converts data signal into signal that can be transmitted
• Medium : Carries data signal
• Data : Data to be sent
• Receiver : Converts received signal to data
• Protocol : Rules

Data Communication Model 

Protocol must be same. Its like language , must be same so receiver can understand the message from sender

Switching Techniques

• Circuit Switching
  Communication path between sender and receiver not changed during the exchange of information.
• Packet Switching
  –Using Store & Forward principles.
  –Data could be sent out of sequence.
  –Data divided to small packets for transmission.
  –Packets sent via several nodes before arriving to its destination

Topologi Network

Referensi
Tanenbaum, A. S., & Wetherall, D. (1996). Computer networks. Prentice hall.

Author :
Wiranata Salim, Bayu Kanigoro