A string of octets containing one bit per
protected VLAN from VLAN IDs 3073 to 4094.
The first octet corresponds to VLAN IDs 3073
through 3080, the second octet to VLAN IDs 3081
through 3088, etc. Within each octet, the most
significant bit represents the lowest numbered
VLAN ID, and the least significant bit represents
the highest numbered VLAN ID.