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.

4.1 The Internet Quiz

Question 1

  • We learned from the video that messages are generally transmitted over the internet by breaking them into numerous packets that reach the reciever through various tracks/courses.

Question 2

  • Open products are sets of rules that specify the behavior of the system, and are generally agreed upon and followed. These are used used on the internet so we can standardize data transmision over multiple devices.

Question 3

  • The WWW and internet are different, since the WWW is a system of linked pages, programs, and files that are accessed from the network that is the internet. THe Internet is the network that the WWW uses be accessed.