subnetica
Get started
01 Read02 Apply03 Complete

Build the idea first, then use the next activity to check it.

TCP, UDP and port numbers

Two ways to deliver, and what decides which application receives data.

subnetica© 2026 · Learn, practice, retain.
AboutFAQPrivacy PolicyTerms & Acceptable UseAccessibilitycontact@subneti.ca
CCNA is a registered trademark of Cisco Systems, Inc. CompTIA Network+ and CompTIA Security+ are registered trademarks of CompTIA, Inc. Subnetica is an independent learning platform and is not affiliated with, endorsed by, or sponsored by Cisco Systems, Inc. or CompTIA, Inc.