NETWORKS

by Alex Ryan

NETWORK

A computer network is a number of computers linked together to allow them to share resources. Networked computers can share hardware, software and data.

Most computer networks have at least one server. A server is a powerful computer that provides one or more services to a network and its users. For example, file storage and email

BUS NETWORK

A bus network is a network which only flows one way. A disadvantage is If one breaks at the front they will all fail to have network . An advantage is that its easy to install plus its cheap to install and it doesn't need much cable.
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ring network

In a ring network each device (workstation, server, printer) is connected to two other devices, this forms a ring for the signals to travel around. Each packet of data on the network travels in one direction and each device receives each packet in turn until the destination device receives it. An advantage This type of network can transfer data quickly, even if there are a large number of devices connected because the data only flows in one direction, so there won’t be any data collisions . an disadvantage If the main cable fails or any device is faulty then the whole network will fail
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star network

In a star network each device on the network has its own cable that connects to a switch or hub. A hub sends every packet of data to every device, whereas a switch only sends a packet of data to the destination device. an advantage very reliable – if one cable or device fails then all the others will continue to work . an disadvantage expensive to install as this type of network uses the most cable (network cable is expensive)
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