Power over Ethernet (PoE) - Explained 

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As a network engineer, I can confirm everything in this video is correct. They are well researched. I would only add that if you're looking to buy a PoE injector, that you carefully read what the product is and what standards it follows and look into if it's active or passive. Just like how different switches have different capabilities, so too will PoE injectors. Also be aware that PoE splitters are a thing too and can often look like PoE injectors so carefully read the product labels and specs when buying. They don't add power to an Ethernet connection, they only split the power already on the line up to be able to power more devices. I personally never saw a need for PoE splitters in 20+ years of working on networks and if any time I needed more PoE ports, I would just put in another switch or replace existing switches with bigger switches, but since PoE splitters exist, it's something to know about so you don't buy the wrong thing.

Man, you are a PowerPoint wizard with these animations

You are doing a fantastic job. For some of us transitioning into IT from a non IT background, your presentation makes it easy to digest. I literally watch your videos ceremoniously lol. Thank you.

I've learned more from this channel for free(Other than paying to be a channel member for the past year) than I have for the $5,000 I spent to get an I.T. support degree from a local college. Kudos to you for making I.T. enjoyable and easy to learn.

You are the only one that when explain something ... My brain doesn't explode from too many complicated explanation ... Well done sir💪🏾

This channel has been helping me when I was in college and now working in IT.

You literally have the BEST no nonsense, right to the point videos I have ever seen. Your method of explaining things is awesome! You do not over-explain it, you just lay things out in a very solid common sense way. Thank you! You've truly helped me grow in knowledge!

Fantastic video as always! Only one misconception exist: in GigaBit network, all 4 pairs are used. This is not mentioned in the video leaving the audience with the impression that only 4 wires are used in Ethernet connection.

The best notification i get is from this channel 😍😍

Great video! I've been working with PoE technology since its emergence and it's rare to find such a comprehensive and concise explanation. I particularly like that you touched on passive PoE devices. Though old and rare, they do still exist (mainly running older building equipment). Just a year or so ago I had someone try to daisy-chain one of those through a modern PoE switch that we had just installed and ended up cooking $5k of hardware!

I didn't know this channel was still active; I honestly thought it was abandoned a while ago! Thank you for all your hard work!

Love your stuff , I am a tech and engineer and watch your videos all day at work.

This is a deeper explanation of POE looking at the Active and Passive features. I never knew this! Thank you Powercert

This video is a Power over Internet to me Thanks for your continued efforts to simplify the networking for us

Now I'm a POE master....thanks for an informative video.....again!!!

As a programmer who wants to understand the lingo of my network engineer, these videos are invaluable. Thank you!

I love the way you explain things in your vids; also the animation is a huge help.

You are such a superior instructor!! Thank you!!! Keep them coming!! Please!!!!

Dulu ingin belajar begini harus beli buku atau kursus, sekarang modal RU-vid saja sudah bisa dapat ilmunya, thanks bro, sangat bermanfaat

These are such simple and amazing videos! Thank you!

Was looking forward to this video

Thank you so much for your great service. Please teach us about ELV system as soon as possible.

I love your way of teaching brother.

Always interesting content and I see the relevant comic text added which is cool and funny..Thank you sir

Thanks so much. Your videos are loaded and simple.

IIT Hyderabad recently shifted to these Cisco PoE wifi access points. I have figured it out 1 month back, now this video clarified everything.

Lmao! 😂😂😂 I love the phone comments when it had too much power! Very well explained. I love all your videos.

What a nice time to have this video

I always love the cuteness of the animations. Great info. Mostly CAT 5 doesn't have those extra wires.

really i was searching about PoE. Thanks

Looks like teaching theory & practical together, makes it easy to understand with animations. Great work sir

educational and entertaining as usual. Thanks!

Conversation between router and telephone was awesome 😂😂 I wasn't able to stop my laugh 😂😂

Your work is priceless. Thanks!

I always learn something watching your video's. Thank You!

Your videos are so helpful! Very Good way of explaining🤩🔥Waiting for more videos about networking☺️

Brutally good explanation. This guy is my hero.

POE lighting is the newest buzz in home construction. Entire rooms can be lit with low voltage LED PoE lights bypassing the electric altogether and there are no building codes or electrical inspectors required. CaT6 cable can legally run through conduit whereas expensive Romex has many conditions before being allowed to do so.

man I really like your channel, you r the best teacher, your way of teaching is the best

Awesome tutorial! Thank you!

Wonderful and plain english! beautifully explained. thanks

You're doing God's own work here, son. I'm a certified IP engineer, and I st ill learn from this channel. Just good, common sense explanations.

This product is a game-changer. Eagerly waiting for mine!

Thank you 🙏💯👍❤️ very resourceful

Well presented; Thank you for sharing.

thanks for the lesson! very informative!

Type three is also called PoE ++ i think. Thanks for the refresher!

Great video! Thank you so much!

great video, everything was explained perfectly, I will be sharing this to help educate people on the benefits of a good poe system

Honestly u are amazing,u are really shaping and making us love IT more,thanks a lot

Awesome video as always!! 😊

thank you for the coffee steam in the beginning of the video :-)

Thank you. This is the Best channel. Sincerely.

Love these videos!

As always, your videos are excellent because the presentation is great and it is easy to understand. Also, can you also make a video for VoIP, please? Thank you so much :))

Thank you professor PowerCert !

I realy enjoy your Educational Video's. Keep it up Excellent Video descriptions.💯🤓

Thanks for the interesting video. It seems like a nifty little device. Certainly worth a try.

Thanks for helping us with excellent video.

Do you have more information on the handshaking method that PoE uses? AFAIK when a connection is made, a PoE switch does not put power down the line until it's requested, but if the requesting device does not have power of it's own, how does it wake up to do that handshake to say I need power?

This is pretty awesome!

So nice, that I had to watch it twice.

Great Video, Thank you

Thanks for good info this channel is too good

Wow that device is amazing thanks!

Thanks for the info.

great video, thanks

Thank you so much.😊

Your video are so helpful ❤❤

Thanks for this nice video

Great very clearly and useful

You should also mention PoE splitters. Although they are not popular, I use them to power some non-PoE 12V switchs.

Best edit ever!!! 👍

Thank you sir.

Thank you 😊

I want to say thank you for all you have done, pls give us active directory

welcome back bro

Thanks so much :)

nice explanation

Great Content

I had a landline telephone. Actually it was required to insert battery in it ,but we never did . Instead we had a ethenet cable that used to power it .

Thanks dude

wake up babe new powercert video just dropped

We need more of your tutorial videos. Please upload more Thnks.

Amazing!

Good info.

thanks 🙂

Any Electronic device that's connected to data is either tethered or wireless. However it will always need power be it a battery or a power outlet. Hence it would be practical to separate data and power unless it is complicated.

I feel liké thé vidéo Is prduce for me .exactly what i need realy thank you

my legend thanks a lot I love u

We got some new Ubiquity switches, where I work, and they had ports labelled with POE+ and POE++ I assume they are 90's and I figure they are preparing the infrastructure to power Computers from the Ethernet, as the industry seems to be trying to get everything to be USB-C too

I learn faster thanks

but that scrolling logo at the top right corner is addicting.

One can not send power (in wired applications). It can only be pulled by the load (proportionally to its resistance).

Fire! Fire! Fire!🔥🔥🔥

When installing home theater systems, I learned that there are different voltages for POE, which you never discussed.

You're awesome

Hi, I have a question. I saw TP-Link PoE injector, on the picture says "it can't supply power for passive PoE devices". What does it mean? It means can't power a PSE or a PD? I don't get it, can anyone explain to me? Thank you and I appreciate it🙏