Big Idea 4.1

  • Computers have evolved a lot over time
  • Computers are interconnected and it is a basis of how they work
  • Routers were made to allow computers to connect to each other and work quickly
  • Routers allow information to go from sender to receiver
  • Packets are small amounts of data sent over a network, which include data, source information, and destination information
  • Packets are sent by the sender and received by the receiver
  • Computer systems are groups of computers working together
  • Computer networks are a group of interconnected devices that send and receive data
  • Packet switching is when a message/file is broken up into packets and sent in any order, then reassembled by the receiving device
  • A path is the network between two computing devices, and is a sequence of directly connected computing devices
  • Bandwidth (measured in bits per second (BPS)) is the maximum amount of data that can be sent in a fixed amount of time on a computer network
  • A protocol is an agreed upon set of rules that packets work under
  • Many different protocols all go through IP in sending information
  • The IETF creates internet standards
  • The network access layer is usually in hardware, and in most homes ethernet
  • It delivers packets through it with the NIC
  • The MAC is it’s unique address
  • Two different types of protocols, one being TCP and the other UDP, TCP is more thorough and correct but slow, while UDP is fast but can have errors

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