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Networks (Hardware (A Network Interface Card (NIC) is a piece of hardware…

- - - - If a device fails or a cable is disconnected, the rest of the network is unaffected.
      - It's simple to add more devices to the network, since each device is connect to the switch using a separate cable.
      - Star topologies tend to have better performance than other setups - data goes straight to the central device so all devices can transmit data at the same time.
      - There are very few data collisions on a star network compared with other network topologies (eg. bus).
    - - In wired networks, every device needs a cable to connect to the central switch or server. This can be expensive, eg. for an office building with 50 terminals.
      - The switch itself is also an expensive piece of hardware.
      - If there is a problem with the switch or the server the whole network is affected.
      - the maximum number of possible connections on the network is determined by the switch - if you need more, you might need to buy a new one.
  - - - Like the star topology, the network is unaffected if a device fails.
      - Bus networks aren't dependent on a central switch working to keep the whole network running
      - They're relatively cheap to set up compared to star networks. The total length of wiring needed is much less, and the hardware you need (the bus cable and terminators) is cheaper than switches, both to buy and to maintain.
    - - Data collisions are common. When there is a data collision the data must be resent, which slows the network down.
      - The more devices you add to the network, the more likely data collisions are. This makes bus topologies unsuitable for large networks.
      - To try and avoid data collisions, devices must wait for the bus to be available before they can send any data - this can also slow the network down.
      - If the bus cable get broken, it splits the network into separate parts. Since the separated networks don't have terminators at both ends of the bus, there will be a lot of reflected signals which can shut down the entire network.