What is computer network? How do we use it? What is it actually???? So, let me explain.
A computer network is a digital telecommunications network which allow nodes to share resources. In computer network, networked computing devices exchange with data each other using a data link. The connection between nodes are established using transmission medias which consists of wireless and physical media.
Network computer devices that originate, route and terminate the data are called network nodes. Nodes can include hosts such as personal computer, phones, servers as well as networking hardware. Two such devices can be said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other.
Advantages and Disadvantages Of Computer Network
| Advantages | Disadvantages |
|---|---|
| easy to communicate | expensive to build |
| Ability to share data, informations and data | breakdowns and possible loss of resources |
| reduce the costs of purchasing hardware | security threats |
| reduce the costs of buying software | bandwidth issue |
| password protected |
Transmission Media
Shelly Cashman said transmission media are materials or substances capable of carrying one or more signals in a communications channel.
| Physical Transmission | Wireless Transmission |
|---|---|
| Twisted-pair cable | Infrared |
| Coaxial cable | Broadcasts Radio |
| Fibre-optic cable | Cellular Radio |
| Microwave | |
| Communication Satellites |
Communications Devices
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