A string of octets containing one bit per
protected VLAN from VLAN IDs 2049 to 3072. The
first octet corresponds to VLAN IDs 2049 through
2056, the second octet to VLAN IDs 2057 through
2064, 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.