Comment by _bfhp

What background does one need to understand the "4.4.8.8.in-addr.arpa" paragraphs? I'm a career web developer who took a networking course many years ago but "timely inversion," "DNS zone," what "public" means as an adjective for a DNS server, "hop," and "block of IP addresses" are all presented like I'm supposed to intimately know them already...maybe I'm just missing something