CWNA Certified Wireless Network Administrator Study Guide, 6th Edition

Chapter 12Power over Ethernet (PoE)

IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:

• History of PoE
  • Nonstandard PoE
  • IEEE 802.3af
  • IEEE Std 802.3-2005, Clause 33
  • IEEE 802.3at-2009
  • IEEE Std 802.3-2018, Clause 33
  • IEEE Std 802.3bt
• PoE devices
  • Powered device (PD)
  • Power-sourcing equipment (PSE)
  • Endpoint PSE
  • Midspan PSE
• Planning and deploying PoE
  • Power planning
  • Redundancy
  • Downgrade PoE capabilities
  • 802.3bt power considerations

In this chapter, you will learn about the various ways that an Ethernet cable can be used to provide power to networking devices. Power over Ethernet (PoE) is not a Wi-Fi technology, nor is it used specifically for Wi-Fi devices. However, it has become the predominant method for powering enterprise-class ...