2 Block Haircut Vs Undercut

I only recently heard the term 2 block and im a full time barber. When i looked it up there was so much variation from one 2 block cut to the next that i couldnt quite figure out what exactly defined the term. What Is A Disconnected Undercut How To Cut And How To The two block haircut is similar to the undercut in some ways. 2 block haircut vs undercut. As