Automatically maps subdomains to page and post permalinks based on post slug.
No. You must first edit your zone file to create the subdomains or a wildcard subdomain to resolve to your WordPress site.
No. You may use any permalink settings.
Subdomains will map to pages and posts based on the post_name field in the database. The subdomain must match the post_name exactly in order to map, or it will redirect to the homepage.
The mapping will be made based on the deepest (left-most) element of the full domain name.