Networking - Technology
Port
A numbered channel on a device used to direct network traffic to the right service
What's it for?
Helps a computer tell which service an incoming connection is meant for.
For example…
Support asks whether port 443 is open so the browser can reach the secure intranet over HTTPS.
HTTPS normally uses port 443, so a firewall may allow internet traffic to that port while blocking a database port from public access.
Think of it like…
Flat numbers in a building: the street address gets you to the block; the port gets you to the right flat