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unit 3 - Coggle Diagram

- - - - Easy to add more computer systems to the network without disrupting the network
      - Quick and easy to set up – well suited for temporary networks
      - Cost-effective as less cabling is needed
    - - It is difficult to troubleshoot the bus if there’s a fault
      - Limited cable length and number of stations – performance degrades as additional computers are added
      - If there is a problem with the main cable or connection, the entire network goes down
      - Low security – all computers on the bus can see all data transmissions
      - Proper termination is required
      - Data collisions are more likely, which causes the network to slow down. A collision is when two computers try to send a packet at the same time
  - - - The transmission of data is simple as packets travel in one direction only, so no collisions.
      - Data is quickly transferred without a bottleneck – consistent data transfer speeds
      - Adding additional nodes has very little impact on bandwidth
    - - If any of the computer systems fail, the ring is broken and data cannot be transmitted efficiently
      - a problem with the main cable or connection and the entire network goes down
      - It is difficult to troubleshoot the ring
      - Because nodes are wired together, to add another you must shut down the network
  - - - Good performance/fast network speed
      - Easy to set up
      - Easy to add more computer systems without taking the network down
      - failure of workstations will have no effect on the network
      - Minimal network collisions
      - Better security
    - - Expensive to install as more cable is required
      - Extra hardware required, such as a hub
- - - - Length is the number of bits in the packet
      - Packet ID is needed so that, afterwards, data from multiple packets can be arranged into the correct order
      - Source address is the IP address of the device that sent the data.
      - Destination address is the IP of the device that should receive the data
      - Protocol is an indication of which protocol (HTTP, FTP, SMTP, etc.) has been used to form the packet.
      - Data is the reason a packet is being sent in the first place, Eventually, all packet components are discarded except for the data itself.
      - Checksum is a technique that verifies that the data that was sent matches the data that was received
    - - Each packet can take a different route through network which therefore makes it secure as it is difficult to intercept all the packets
      - Packets are less likely to be affected by network failure because they can simply take an alternative route
      - Each packet can take a different route through network which means more efficient use of data lines as packet can use least busy route
      - Each packet can take a different route through network which means a node failure does not stop the packet reaching its destination