Port numbers flashcards and drill

Port numbers are memory work, so the fastest way to learn them is retrieval, not rereading. Choose a mode, answer, and the drill tells you at once whether you were right. The reference list under the drill groups the ports by purpose.

Patterns that make them easier

• Most secure variants sit next to or near the plain port: 80 and 443, 389 and 636, 110 and 995, 143 and 993.
• SSH, SFTP and SCP all share port 22; FTP uses 21 for control and 20 for data in active mode.
• Mail has three jobs: SMTP sends (25 between servers, 587 or 465 for clients), POP3 and IMAP fetch.

The annotated list is in the common ports cheat sheet. Ports are tested in Network+ N10-009 and Security+ SY0-801; try the port practice questions for scenario wording.