Simple definition
A Fibre Channel zone restricts communication among selected ports in a SAN fabric, typically using WWPN identifiers.
Purpose and use
A Fibre Channel zone defines which ports or identities may communicate within the configured fabric.
How does it work?
It narrows visibility and communication scope between initiators and targets.
Example and verification
After replacing an HBA, verify port identities and the configuration actually active.
Points to watch
Zoning does not replace storage-side LUN masking or encrypt traffic.
In short
Zoning and LUN presentation must align to authorize the intended path.