Which printers come with Jetdirect embedded within?

[Herm5]

I was reading this article below

https://support.hp.com/us-en/document/bpj02738

and noticed the phrase "...Most HP printers with internal HP Jetdirect print servers..." which leads me to ask:

Which HP printer models have internal HP Jetdirect embedded within?

That phrase is found in the section entitled:

"Resetting the HP Jetdirect to factory default settings"

[Valsimot]

Like 99% of printers now have embedded JetDirect ( LAN )

[Herm5]

Thank you. 

Which legacy printers did not have the Jetdirect embedded within?

Or maybe a better question: when did HP begin including the Jetdirect in every printer?

[Valsimot · Accepted solution]

I would say closely starting like 10 years ago all printers that have wired network capabilities had embedded jet direct.

Before that, a wired network was an option on some models, and users if needed could install external Jetdirect cards as an accessory.

[Herm5]

Thank you Valsimot for the helpful replies.

I found this article below:

https://support.hp.com/us-en/document/c02480766

Does it mean all modern HP printers need ports 20 and 21 due to them having Jetdirect embedded within?

[Valsimot]

Ports 20 and 21 are for FTP if the printer supports FTP printing/connection those ports are needed.