Port Numbers and Their Protocols

Well-Known Ports

• Range: 0 to 1023

Key Ports for A+ Exam

Ports 20 and 21: FTP (File Transfer Protocol)

• Years: 2020 and 2021 (Global pandemic period)
• Analogy: FTP forget that period

Port 22: SSH (Secure Shell)

• Visual: Turn 2s into Ss
• Fun Analogy: 2 Ninja Turtles on left and right (with shells)

Port 23: Telnet

• Analogy: Michael Jordan's jersey number (23)
• Mnemonic: Michael tell it to the net Jordan

Port 25: SMTP (Simple Mail Transfer Protocol)

• Holiday: December 25 (Christmas)
• Analogy: Mail Transfer, like Santa's presents

Port 53: DNS (Domain Name System)

• Year 1953: Eisenhower sworn in, registered eisenhower.com
• Alternative: Queen Elizabeth II or end of Korean War

Ports 67 and 68: DHCP (Dynamic Host Configuration Protocol)

• Alternative: 69 (awkward analogy)

Port 80: HTTP (Hypertext Transfer Protocol)

• Visual: 80-year-old men, surfing the web in the 80s

Port 110: POP3 (Post Office Protocol)

• Analogy: 110-calorie popcorn bags, envelopes, mail

Ports 137 and 139: NetBIOS (Network Basic Input Output System)

• Visual: Net (3 letters), BIOS (7 letters), 137

Port 143: IMAP (Internet Message Access Protocol)

• Analogy: 'I love you' (1 letter, 4 letters, 3 letters)

Ports 161 and 162: SNMP (Simple Network Management Protocol)

• Year 161: Marcus Aurelius became Emperor

Port 389: LDAP (Lightweight Directory Access Protocol)

• Analogy: 389-page book
• Historical: Libraries burned in 389 AD

Port 443: HTTPS (Hypertext Transfer Protocol Secure)

• Visual: Luggage with 3 locks (A4 number, a four number, and a three number)

Port 445: SMB (Server Message Block)

• Game: Super Mario Brothers
• Analogy: Mario jumping over the blocks

Port 3389: RDP (Remote Desktop Protocol)

• Visual: Snowman wallpaper, remote connection displaying '33.89'

Study Tips

• Recommendation: Bookmark and rewatch the video
• Repetition: 3 times suggested for good memorization
• Goal: Learn at least 3-4 ports well