In the previous episode (Episode #3 - Quick nmap Introduction), Ryan and Evan demonstrated why we use nmap, where to get nmap, and how to perform a basic nmap scan. In this episode, they do a quick explanation of the results.

NSE - Network Scan Engine
DNS - Domain Name System
TCP - Transmission Control Protocol
IP - Internet Protocol

Don't be intimidated by all the new words and numbers. This is a different language, a language that computers speak on a TCP/IP network. In time, you can (and should) learn the language too!

NOTE: Evan made an error in this episode, see if you can find it!