A:AnswerHere's the specifications to compare the HL-L3270CDW and HL-3170CDW.
https://www.brother-usa.com/products/hll3270cdw
https://www.brother-usa.com/products/hl3170cdw
A:AnswerThis printer does not scan. You could take a picture of what you need to copy, then print the picture if you didn’t have any other option to make a copy.
A:AnswerFor me, being on a windows 10 super locked down image from my employer, it automagically appeared as a printer to select due to it being, presumably on the same WiFi network.
A:AnswerI Google searched what printer models that toner can be used with, and this is what it says on Brother's web site.
Brother Genuine TN221BK is for use with: HL-3140CW, HL-3170CDW, HL-3180CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW.
A:AnswerFor best results, please use paper 20-24 Ibs. Here is a FAQ with recommended paper.
https://help.brother-usa.com/app/answers/detail/a_id/155925?R3ModelID=HLL3270CDW