Video Notes

4.1.1 Notes

  • All computing devices work together in a network
  • Computer devices are physical aritfacts that can run a progra,
    • Like servers, routers, computers, and tablets
  • Computing system is a group of computing devices and programs that work together for a common purpose
  • A computer network is a group of computing devices that send and recive data.
    • A type of computer network
    • A packet is a small amount of data sent over a network
    • Message file is broken up into packets and sent through various paths (that can include a router) into the reciever.
  • A path between 2 computing devices in a network is a sequence of a sending computer device and a reciever.
  • routing is finding a path between sender and reciever
  • Bandwidth of a computer netweork is the maximum amount of data that can be sent in a fixed amount of time.
    • Bandwidth is measured in bits per second.

4.1.2 Notes

  • Computer networks facilitate the transfer of data
  • How the internet works
    • The internet is a computer network consinting of interconnected networks tha tuse standardized, non-proprieary communication ports
    • Access to the internet depends on the abilitty to connect a computing device to an internet connected device.
  • Data is sent through internet via packets
    • Information is passed through the internet as a data stream
      • Chunks of data encapsulated in packets
    • Packets contain a chunk of data and metadata used for routing the Packet between tge origin and te destination
    • Packets can arrive at the destination in order, out of order, or not at all
    • IP, TCP, UDP are common protocls used on the internet
  • Difference between internet and World wide Web
    • The world wide web is a system of linked pages programs and files
    • HTTP is a protocol used on the WWW
    • The WWW uses the internet.
  • Protocols are an agreed upon set of rules that specify the behavior of a system
    • THe protocols in the internet are open and allows users to easily connect additional computing devices.
  • Routing on the internet is dynamic
  • The scalability of a system is the capacity for it to change in size and scales to meet new demands
    • internet was designed to be scaleable.

Quiz