Module 2: Networking Fundamentals (Overview)

Overview

Bandwidth decisions are among the most important considerations when a network is designed. This module discusses the importance of bandwidth and explains how it is measured.


Layered models are used to describe network functions. This module covers the two most important models, which are the Open System Interconnection (OSI) model and the Transmission Control Protocol/Internet Protocol (TCP/IP) model. The module also presents the differences and similarities between the two models.

This module also includes a brief history of networking. Students will learn about network devices and different types of physical and logical layouts. This module also defines and compares LANs, MANs, WANs, SANs, and VPNs.

Students who complete this module should be able to perform the following tasks:

• Explain the importance of bandwidth in networking
• Use an analogy to explain bandwidth
• Identify bps, kbps, Mbps, and Gbps as units of bandwidth
• Explain the difference between bandwidth and throughput
• Calculate data transfer rates
• Explain why layered models are used to describe data communication
• Explain the development of the OSI model
• List the advantages of a layered approach
• Identify each of the seven layers of the OSI model
• Identify the four layers of the TCP/IP model
• Describe the similarities and differences between the two models
• Briefly outline the history of networking
• Identify devices used in networking
• Understand the role of protocols in networking
• Define LAN, WAN, MAN, and SAN
• Explain VPNs and their advantages
• Describe the differences between intranets and extranets