why Power over Ethernet (PoE) is amazing!! // FREE CCNA // EP 12
Source: YouTube · NetworkChuck · published Mar 14, 2021 · 19:41
Power over Ethernet (PoE) enables the transmission of both data and electrical power over a single network cable, simplifying device installation. The technology originated with Cisco's "Inline Power" and has evolved into IEEE standards supporting increasingly high wattages for diverse devices.
Key Takeaways:
• Cisco initially developed "Inline Power" in 2000 to eliminate the need for separate power cables for IP phones, using unused wires in Ethernet cables 1:20-1:34
• The technology evolved into IEEE standards, starting with 802.3af (15.4W) and advancing to 802.3bt Type 4 (90W), which can power laptops and building lighting 3:02-3:25 & 7:48-8:10
• Active PoE utilizes protocols like CDP and LLDP to negotiate power delivery between the Power Sourcing Equipment (PSE) and Powered Device (PD), ensuring safe operation 9:07-10:24
• Using PoE reduces infrastructure costs by removing the need for electricians and allows network engineers to deploy devices like WAPs and cameras more flexibly 4:01-5:16
With the capacity to deliver up to 90 watts, PoE is becoming a universal solution for powering smart devices and building infrastructure.
Sources:
- 1:20-1:34 Origins of Cisco Inline Power
- 3:02-3:25 802.3af Standard Introduction
- 7:48-8:10 802.3bt Type 4 and high-power applications
- 9:07-10:24 Active vs. Passive PoE and negotiation protocols
- 4:01-5:16 Benefits and implementation of PoE
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First 800 characters of the transcript
power over ethernet p-o-e it's kind of amazing why let me show you this is awesome this phone right here it's an iphone to make this thing work we need two things we need power and we need internet and ethernet connection we can accomplish both those things with one cable here we go here comes my favorite sound in the world oh yeah and boom with one cable power and data so in this video we're gonna uncover unpack why this is so cool i mean obviously it is right but we'll talk more about it and yeah we're gonna get technical we're even gonna get down and dirty with our cisco switch cli and watch some power over ethernet happen so yeah you're gonna learn some stuff today and shout out to the sponsor of our video and this entire series bozon software if you want to get your ccna ccnp a plus s…