Network (Communication Technologies)

Network (Communication Technologies)

1. More than one computer connected by either cables or wireless, that share data.

2. A computer network is a set of computers connected together for the purpose of sharing resources. The most common resource shared today is connection to the Internet. Other shared resources can include a printer or a file server. An online definition of a network.

3. Pan - Personal Area Network. LAN - Local area networkl. MAN - Metropolitan Area network. Wan - Wide area network.

4. Access methods. Token ring (issues with big talkers.Csma/CD - Ethernet networks Listen, send, listen for coli. CSMA/CA Wierless networks

5. Network protocol is for exchanging data between computers or processors, it is a set of rules and formats.

6. Bandwidth

   • Bandwidth is the amount of data that can be reseaved typically through a cable either copper of fiber. Buisnesses will often have there own dedicated broadband line from a company like virgin media. this will often be very expencive but it means a higher garentee of constent bandwidth.
   • Bandwidth noise is when there is electricity that interfears with the data that you are trying to send this electricity is unwanted.
   • Data Compression - This is the process of making data take up less bits when you are sending it. This can either be done through lossy or lossless reduction.

7. Parrellel and serial transmission

8. Digital Signalling methods

9. DTE and DCE (hardware) Data Terminating Equipment - smartphone/ tablet. Data Circuit Terminating Equipment - Switch/router