Foundation glossary/Networking
Port
Companion card for the Foundation course — study the related lesson for full progress.
Simple explanation
Door number for a service on a device.
Technical explanation
TCP/UDP 0–65535.
Real-life scenario
Your phone uses 443 for almost every app API (Instagram, Gmail, UPI backends).
Security relevance
Attack surface includes listening ports — know what should be open.
Practical example
443 HTTPS, 22 SSH, 53 DNS.
Host
Port 443
Service (HTTPS)
Mini quiz
HTTPS commonly uses TCP port:
Related lesson
Continue in the Foundation course: open lesson →