Networks

Network topologies

Networks

Network topology

• Is the way the devices are arranged in a network

• In a wired network, it shows how the computers are connected together

• In a wireless network it shows how the computers communicate with each other

Networks

Network topologies

The three main network topologies are:

• Ring• Bus• Star

Networks

The ring topology

• The computers are arranged in a circle

• Data passes around the ring until it reaches the correct computer

• They are simple to set up

• It is easy to add extra computers

• A break in a wire can cause the network to fail

Networks

The bus topology

• A backbone cable is usually used

• A small amount of cable is needed

• Simple to install• Easy to add extra

devices• Slow for larger

networks• Reliance on the

backbone cable

Networks

The star topology

• Uses a central connection point

• This can be a server or a hub/switch

• They use a lot of wire• They depend on the central

device• Easy to add extra

computers without disturbing the network

• Fault tolerant

Networks

Question

Produce a list outlining the advantages and disadvantages in networking computers.The first advantage and disadvantage has been completed for you.

Advantages Disadvantages

Ability to share files Technical knowledge needed to set one up

Networks

Answers

Advantages Disadvantages

Ability to share files Technical knowledge needed to set one up

Can share hardware Networks can fail

Can share software May need to employ a network manager

Saves time as software can be installed centrally rather than on each computer

Risk of viruses entering the system

Improved security (e.g., passwords, encryption, etc.)

Danger of hackers accessing files using the Internet

Can back up data centrally Wiring can be expensive

Can use services such as email

Access to a central store of data