Network topologies, protocols and layers

Network topologies, protocols and layers

1. Star and mesh network topologies

   • Mesh Network
     • A network setup where each computer and network device is interconnected with one another, allowing for most transmissions to be distributed, even if one of the connections go down.
     • Advantages
       • Can handle high amounts of traffic, because multiple devices can transmit data simultaneously.
       • A failure of one device does not cause a break in the network or transmission of data.
       • Adding additional devices does not disrupt data transmission between other devices.
     • Disadvantages
       • The cost to implement is higher than other network topologies, making it a less desirable option.
       • Building and maintaining the topology is difficult and time consuming.
       • The chance of redundant connections is high, which adds to the high costs and potential for reduced efficiency.
   • Star Network
     • In a star network each device on the network has its own cable that connects to a switch or hub
     • Advantages
       • very reliable – if one cable or device fails then all the others will continue to work
       • high performing as no data collisions can occur
     • Disadvantages
       • expensive to install as this type of network uses the most cable (network cable is expensive)
       • extra 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

2. Wifi

   • Frequency and channels
     • A wireless connection uses radio signals to send data across networks.
   • Encryption

3. Ethernet

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