2. Introduction to computer networks

  1. Overview
  2. Basics
    • [T] Read all in these slides.
    • [Review]
      • Define data communications and networking.
      • Identify five components of data communication.
      • Identify three data flows.
      • Describe three network performance criteria.
      • Draw two types of connection with their examples.
      • Draw five categories of topology with their examples.
      • Explain four categories of networks with their examples.
      • Distinguish an internet and the Internet.
      • Describe the hierarchical organization of the Internet.
      • Define a protocol with the three key elements.
      • Explain the need of standards.
      • Relate protocols and standards in the Internet.
  3. Network models
    • [T] Read all in these slides.
    • [Review]
      • List the five layers in the Internet network model.
      • Relate the two adjacent layers in terms of service user, service provider, and interfaces.
      • Interpret encapsulation and decapsulation.
      • List the four address types in the Internet network model, with the corresponding layer in which each address types is mainly used.
      • Show the change of addresses in a packet that is delivered to a destination through three different physical networks, given an example of a network of networks.
      • Identify main roles and functions in each layer in the Internet network model.
      • Identify what kind of information is added in each layer.
      • State the purpose of framing.
      • List the three types of control.