Learning Objectives

After successfully completing this section, you should be able to

  1. list computer network protocols.
  2. explain each of these protocols.
  3. describe the services supported by each of these network protocols.

Learning Tasks

Required:

  1. Watch the slideshow prepared for this section.
  2. Study Section 1.5, Protocol Layers and Their Service Models, in the textbook.
  3. Make a list of TCP/IP protocol layers and write a descriptive summary of each layer. Include the names of the different kinds of packets at the different layers.

Suggested:

  1. Search the Internet for some introductory articles about network protocols to read and post the links to the course forum with your comments.

Terms and Topics

Section 2 – Network Protocols and Services

Protocol layers and their service models
Layered architecture
Protocol layering
Service and service model
Protocol stack
Internet protocol stack
ISO OSI reference model

Message at application layer
Segment at transport layer
Datagram at network layer
Frame at link layer
Payload field
Encapsulation 

Leading Questions

  1. What layers are included in the internet protocol stack?
  2. What layers are included in the ISO OSI reference model?
  3. What is a packet called at application layer?
  4. What is a packet called at transport layer?
  5. What is a packet called at network layer?
  6. What is a packet called at link layer?
  7. What services are provided by each protocol layer in the Internet protocol stack?
  8. What services are provided by each protocol layer in the OSI reference model?
  9. What does encapsulation mean in the OSI reference model?