Nodes are allowed to communicate only with other members of their assigned zone, but nodes can belong to multiple zones.
In the example shown in the slide, the backup server and tape library are accessible to both Finance Storage and Engineering Storage. Overlapping zones provide flexibility in allocating and sharing resources.
We have created one zone so that the financial server and financial storage can access each other. We have created another zone which includes the engineering server and engineering storage.
Then we include the backup server and tape in another zone to which we can either
add both lots of storage into this zone or create
2 separate zones for each applications storage depending on the level of flexibility required.