What is a benefit of WWN zoning over port zoning?

What is a benefit of WWN zoning over port zoning?

A.
A server, after being moved to another switch port in the fabric, maintains connectivity to its
zone partners without the need to modify the zoning configuration.

B.
A server, after replacement of its HBAs, maintains connectivity to its zone partners without the
need to modify the zoning configuration.

C.
A server, after replacement of its HBAs, does not require performing a fabric login to maintain
connectivity to its zone partners.

D.
A server, after being moved to another fabric, maintains connectivity to its zone partners
without the need to modify the zoning configuration.

Explanation:

Types of Zoning
Zoning can be categorized into three types:
Port zoning: Uses the physical address of switch ports to define zones. In port zoning, access to
node is determined by the physical switch port to which a node is connected. The zone members
are the port identifier (switch domain ID and port number) to which HBA and its targets (storage
devices) are connected. If a node is moved to another switch port in the fabric, port zoning must
be modified to allow the node, in its new port, to participate in its original zone. However, if an HBA
or storage device port fails, an administrator just has to replace the failed device without changing
the zoning configuration.
WWN zoning: Uses World Wide Names to define zones. The zone members are the unique WWN
addresses of the HBA and its targets (storage devices). A major advantage of WWN zoning is its
flexibility. WWN zoning allows nodes to be moved to another switch port in the fabric and maintain
connectivity to its zone partners without having to modify the zone configuration. This is possible
because the WWN is static to the node port.
Mixed zoning: Combines the qualities of both WWN zoning and port zoning. Using mixed zoning
enables a specific node port to be tied to the WWN of another node.

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