Port numbers Memes

The number of people who know that DHCP servers listen on port 67 is inversely proportional to the number of people who've ever had to manually configure network settings. For most folks, networks just "work magically" until they don't. Meanwhile, the networking veterans are tapping their temples because they've debugged enough connection issues to know that port 67 is where all your IP address begging happens. It's like knowing the secret handshake at the exclusive club called "I've actually read an RFC."