Arduino ethernet shied with poE

Hi guys. I have two questions.

Someone says Arduino Ethernet = Arduino Uno + WizNet W5100 TCP/IP Embedded Ethernet Controller. So Don't I need arduino uno?

If I buy arduino ethernet shied with poE, Can I connect RJ45, send data and supply power?

Thank you for reading my question.

So Don't I need arduino uno?

Not if you have the Arduino Ethernet board which combines an Arduino and an Ethernet shield in one board.

If I buy arduino ethernet shied with poE, Can I connect RJ45, send data and supply power?

Yes.

You really don't need to get a expansive Ethernet shield with POE

This is one so cheap: and you can find similar ones over ebay, amazon...

POE

I use a similar one from mikrotik ( expansive one ), but this one is so easy to fit and use with a UNO, mega, etc and any ws5100.