Exam DEA-1TT4 topic 1 question 27 discussion

Correct, Port zoning: Port zoning uses the switch port ID to define zones.

Answer is correct = Port Zoning (Page 326) Uses the switch port ID 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 identifiers (switch domain ID and port number) to which FC HBA and its targets (storage systems) are connected. If a node is moved to another switch port in the fabric, port zoning must be modified to enable the node, in its new port, to participate in its original zone. However, if an FC HBA or storage system port fails, an administrator has to replace the failed device without changing the zoning configuration.

Answer is correct = Port Zoning. Port Zoning uses the switch port IDs to define the zones. WWN Zoning uses the World wide Names to define the zones, this would show the zone stretch from the compute port to the storage port.

b: What are the pros and cons of port zoning and WWN zoning on a Fibre Channel SAN fabric? By Fibre Channel SAN zoning, we mean partitioning Fibre Channel fabric into groups to add security and improve management. Fibre Channel SANs can be zoned according to the World Wide Name (WWN) of each device, or according to switch ports. WWN zoning groups a number of WWNs in a storage-area network zone and allows them to communicate with each other. The switch port that each device is connected to is irrelevant when WWN zoning is configured. An advantage to this type of zoning is that if a port is suspected of being faulty, another port can be used without the need for fabric reconfiguration. A disadvantage with WWN zoning is that if there's a host bus adapter (HBA) failure, the fabric will need to be reconfigured for the host to reconnect to its storage. WWN zoning is sometimes referred to as soft zoning.