Where I live, a graduate with an MBBS degree (Master of Medicine, Master of Surgery) is called a doctor. To me, strictly speaking, he is a doctor only...
In computer networking, a virtual storage area network (VSAN) is a collection of ports from a set of connected Fibre Channel switches, that form a virtual fabric. Ports within a single switch can be partitioned into multiple VSANs, despite sharing hardware resources.
Re: Types Of Vlans. I think you need to think more on the terms of switching blocks. In this sense local means vlans are only significant to a specific switch block. It follows the idea that only 20% of the traffic stays in the switch block while 80% traverses the core.