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A2.3 Data transmissionsA2.3.3

Packet switching for sending data across a network

Explain how packet switching is used to send data across a network

SL + HL≈ 40 minCommand term: ExplainPremium

In this lesson

  • How data is split into packets, each with a header holding addressing and control information
  • How packets travel independently and are reassembled at the destination
  • The roles of switches and routers in packet switching

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What's inside

  1. LearnSending data in pieces
  2. LabA message in packets
  3. CheckOrder the steps
  4. LearnSwitches and routers in packet switching
  5. LearnWhy not reserve a path?
  6. CheckSwitch or router?
  7. ExamWorked exam answer
  8. ReviewMistakes examiners see
  9. Exam practiceExam-style questions

Ends with 5 exam-style questions worth 11 marks, with a self-marking markscheme.