University
Computer networks
Final exam notes

Final exam notes

Notes

  • Question from each chapter.
  • Explanatory question, e.g. explain what is $x$?. Where $x$ is related to computer network principle, technology.
  • True/false with reasoning.
  • Numerical questions (with some calculations), around 5 - 6 questions.
  • Routing questions.
  • Chapter 6 (Link layer) is going to be on the final exam.

Chapter 1-5

Chapter 1

Introduction into computer networks, ISP, different types of links. Two types of switching:

  • Packet switching
  • Circuit switching

Delays:

  • Processing delay
  • Queuing delay
  • Transmission delay
  • Propagation delay

Overview of layers

Chapter 2 - Application Layer

HyperText Transfer Protocol (HTTP)

  • Use TCP

    • Client (browser) initiate TCP connection (creates socket) using port 80 to server

  • Connectionfull vs connectionless mechanism

  • Persistent connection

Chapter 3 - Transport layer
  • Provide logical communication between process of different hosts Two type of protocol
  • TCP
  • UDP

Protocols

  • Go back and repeat
  • Selective repeat
Information flow