What is Resolution of Monitor? Full HD vs 2K vs 4K

As you may know, many displays or monitors nowadays boast about having 4K UHD (Ultra HD); however, what exactly is 4K UHD, and how is it different from the Full HD we were used to seeing in the past?

What resolutions are there between FHD (1080p),2k, and 4k? - Quora

4k vs 1080p: Which Video Resolution Do You Need?

2K or 4K? What's Better on a Gaming Monitor Screen - Viotek

4K vs 1440p vs 1080p - What Monitor Resolution Should You Buy?

2k vs 4k Resolution: Which Should You Choose?

Why are the major screen resolutions (360p, 720p, 1080p) all multiples of the number of degrees in a circle? - Quora

Resolution from 4K, 6K to 8K: What's the Difference And How to Choose

2K resolution - Wikipedia

SEAN J VINCENT BLOG: 4K vs 1080p. or just a good film.

1080p vs 1440p vs 4k: Which Resolution Is Right For You?

1080p vs 1440p vs 4k: Which Resolution Is Right For You?