The CIDR block assigned to the subnet.
=available_ip_address_count
The number of unused IP addresses in the subnet. Note that the
IP addresses for any stopped instances are considered unavailable.
=availability_zone
The Availability Zone of the subnet.
=default_for_az
Indicates whether this is the default subnet for the
Availability Zone.
=map_public_ip_on_launch
Indicates whether instances launched in this subnet receive a
public IP address.
=tag_set Any tags assigned to the resource, each one wrapped
in an item element.