May 2012
Intermediate to advanced
768 pages
21h 7m
English
book
CWNA: Certified Wireless Network Administrator Official Study Guide: Exam PW0-105, 3rd Edition
by David D. Coleman, David A. Westcott
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Chapter 17
Power 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
PoE devices (overview)
Powered device (PD)
Power-sourcing equipment (PSE)
Endpoint PSE
Midspan PSE
Power-sourcing equipment pin assignments
Planning and deploying PoE
Power planning
Redundancy
802.11n and PoE
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 access points, thus making it a necessary and important ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.