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CS - Networks

What is a 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.

What are the two types of Network?

Local Area Network (LAN) and Wide Area Network (WAN)

What is the difference between LAN and WAN.

A LAN covers a small area such as one site or building, eg a school or a college, while a WAN covers a large geographical area. Most WANs are made from several LANs connected together.

What is an example of a WAN?

The Internet is the largest WAN.

What is an example of a LAN

A school network is usually a LAN.

What is BUS network and why use it?

In a bus network all the workstations, servers and printers are joined to one cable (the bus). At each end of the cable a terminator is fitted to stop signals reflecting back down the bus. It is easy to install and is cheaper than other networks to install.

What is a Disadvantage of the BUS network?

If any part of the cable breaks, then the entire network is broken.

What is Ring network and why use it?

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.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.

What is Star network and why use it?

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. Is very reliable - if one cable or device fails then all the others will continue to work.

What is a Disadvantage of the Star network?

If a hub or switch fails all the devices connected to it will have no network connection.

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