Network Topologies

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.



A ring network, where each device is connected to two other devices to form a ring.




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.

Disadvantage

If the main cable fails or any device is faulty then the whole network will fail.

advanteges and dissadvantegs star network

AdvantagesDisadvantages

very reliable – if one cable or device fails then all the others will continue to workexpensive to install as this type of network uses the most cable (network cable is expensive)

high performing as no data collisions occurextra hardware required (hubs or switches) which adds to cost

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

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.

how are data and files are sent (RING)

The server will send the information to the computers.

Bus Network

Advantages

Disadvantages

easy to installif the main cable fails or gets damaged the whole network will fail

cheap to install, as it doesn’t require much cable



as more workstations are connected the performance of the network will become slower because of data collisions

every workstation on the network "sees" all of the data on the network – this is a security risk

How data and files are sent ( bus)

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.


If one wire goes down everything has gone

Why is the bus network to use

~its cheep

~ dose not require much cables

~ easy to use