Module 8: Routers

CMPS 161: Networking and Security


The TCP/IP model can be considered the backbone of the internet. We will look at the four layers that collectively form the TCP/IP model. Note that practically every activity on the internet involves using the TCP and IP protocols (in some cases TCP is replaced with UDP) and a good understanding of these protocols is therefore very important. Therefore, we will look in detail how TCP connections work and how IP addresses are used for delivery, including IPv4 vs IPv6 and subnets. In addition to TCP/IP, we will look at the devices that make sure that IP addressed packets get delivered to their destination; routers.

Module Objectives

  • Describe the purpose of a router
  • Describe the purpose of a gateway
  • Describe the steps (software and hardware) for connecting to a router’s console port
  • Describe the Cisco IOS command structure
  • Define the function of the command-line interface
  • Define the functional difference with the router’s user and privileged EXEC modes
  • Be able to enter basic router configuration modes
  • Demonstrate that you can enable and disable certain router interfaces
  • Describe what information is contained in the running-configuration file

Learning Resources

  • Module 8 Readings: Chapter 7
  • Module 8 Slides: Chapter 7

Learning Activities

  • Module 8 Quiz: Chapter 7
  • Module 8 Assignment: Critical Thinking questions from the end of the chapter

For Further Study

It is highly recommended to work through the exercises at the end of the chapter.

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