connectivity

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GCSE Computing Mind Map on connectivity, created by Angel Liu on 17/01/2020.
Angel Liu
Mind Map by Angel Liu, updated more than 1 year ago
Angel Liu
Created by Angel Liu over 4 years ago
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Resource summary

connectivity
  1. deep sea cables
    1. the most connections are in ammerica- europe and america-china
      1. There are many connections beacause many similar interests and business
      2. different colours show direction of flow
        1. placed close to shore and shallow areas
        2. bandwith
          1. is also the amount of data that can be transmitted in a fixed amount of time
            1. characterized as network bandwidth, data bandwidth, or digital bandwidth
            2. connection speed
              1. speed that data is transferred between your device and the internet
                1. two types of connection speed
                  1. Download speed or receiving speed means the rate that information travels from the internet to your device
                    1. viewing a web page
                      1. downloading a program
                        1. or recieving an email
                        2. Upload speed or send speed means the rate that information travels from your device to the internet
                          1. sending an email
                            1. at school upload is higher than download
                        3. Broadband
                          1. broadband is wide bandwidth data transmission which transports multiple signals and traffic types
                          2. media used for connection
                            1. fibre optics
                              1. expensive
                                1. very expensive to install
                                  1. delicate
                                2. a much greater bandwidth
                                3. coxial cable
                                  1. advantages
                                    1. sufficient frequency range to support multiple channels
                                    2. disadvantages:
                                      1. It is bulky.
                                        1. It is expensive to install for longer distances due to its thickness and stiffness.
                                          1. As single cable is used for signal transmission across the entire network, in case of failure in one cable the entire network will be do
                                        2. Twisted pair
                                          1. advantages
                                          2. copper cables
                                            1. cheap
                                              1. not that fast
                                                1. expensive
                                              2. wireless
                                                1. cheap because no cables
                                                  1. easy to set up
                                                    1. link devieces
                                                      1. access everything anywhere
                                                        1. less secure than cables
                                                          1. there may be interferences
                                                          2. slower
                                                          3. buffering
                                                            1. an area of memory used for temporary storage data when a program or hardware device needs an uninterrupted flow of information
                                                            2. quiz answers
                                                              1. internet providers give priority to downloading because most users spend more time downloading
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