Ethernet Networks

This online course describes the operation of fixed line and wireless Ethernet networks with reference to their address schemes, protocols, functional elements and security methods.

Ethernet Networks

Course Description

This course by PTT builds on the introductory course Ethernet Fundamentals to describe in detail the operation and security aspects of both fixed line and wireless local area networks. The course begins by describing the problems associated with network loops and explains the operation of protocols that allow Ethernet switches to avoid such loops. The relative benefits of routing and switching and the roles of translating bridges, routers and switches are compared. The role and operation of ARP, NAT and DHCP protocols in address translation and allocation are discussed. Security in a LAN is discussed with reference to firewalls, proxy servers and a DMZ. The operation and topology of wireless networks is discussed with reference to the role of access points and a wireless controller. Finally, the security aspects of a WiFi system... Read More »

This course by PTT builds on the introductory course Ethernet Fundamentals to describe in detail the operation and security aspects of both fixed line and wireless local area networks.

The course begins by describing the problems associated with network loops and explains the operation of protocols that allow Ethernet switches to avoid such loops. The relative benefits of routing and switching and the roles of translating bridges, routers and switches are compared. The role and operation of ARP, NAT and DHCP protocols in address translation and allocation are discussed. Security in a LAN is discussed with reference to firewalls, proxy servers and a DMZ. The operation and topology of wireless networks is discussed with reference to the role of access points and a wireless controller. Finally, the security aspects of a WiFi system are discussed.

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Course Outcomes:
  • Describe the advantages, features and operation of a switch in an Ethernet-based local area network
  • Describe the role and operation of the Spanning Tree Protocol (STP) and the advantages of Rapid STP
  • Explain the basic principles and role of routing in an IP-based network
  • Compare the role and capabilities of translating bridges, switches and routers in interconnecting networks
  • Describe how devices and data transfer sessions in a local area network (LAN) are identified
  • Describe the role and operation of the address resolution protocol (ARP) and network address translation (NAT)
  • Describe the role and features of the Dynamic Host Configuration Protocol (DHCP)
  • Describe the role of a router and a modem between a LAN and a broadband connection with reference to address allocation, address translation and protocol conversion
  • Describe and compare the role of a firewall, a proxy server and a DMZ in preventing unauthorised access to a local area network
  • Describe the role of the components of a wireless local area network including access points, distribution network and wireless controller
  • Compare the characteristics of the 2.4 GHz and 5 GHz WiFi radio frequency bands
  • Explain how collisions between transmissions in a WLAN are avoided
  • Describe the techniques used to ensure the security of WiFi communications
  • Compare the topology and advantages of centralised and distributed control WiFi systems
Course Details:

Target Audience

This PTT online course is aimed at those responsible for the design, installation and maintenance of Ethernet local area networks.

Access Timeframe

1 Year

Prerequisites

An understanding of the basic principles of operation of Ethernet local area networks. It is recommended that the PTT course Ethernet Fundamentals is studied before attempting this course.
Certificate Info:

Type of Certification

Certificate of Completion

Format of Certification

Digital

Method of Obtaining Certification

Upon successful completion of the course, the learner can download a certificate.

Technical Requirements

There are two versions of this course, one designed for access on a PC or laptop, the other designed for access on a tablet.

PC version
This version requires a PC or laptop running a browser such as Internet Explorer 6 or above, Firefox 2 or above, Google Chrome or Safari is required. The PC should have Internet access and be running Flash version 8 or above. A screen resolution of at least 1024x768 is necessary.

Tablet version
This version of the course is designed for study on a tablet through the learntelecoms™ App which is available for Apple® iPad® and for Android™.

Minimum requirements

  • learntelecoms App for Android: 7in tablet or larger with ARMv7 processor running Android 2.3 or higher
  • learntelecoms App for iPad running iOS 6.1 or higher

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