The list of group numbers to which the port is
allowed to set access, where a group number is in
the range 0-255. The OCTET STRING contains a
bitmap, with one bit for each group. Corresponding
bit numbers start with 0 as the high-order bit of
the first octet. Corresponds directly to PORT
AUTHORIZED GROUPS and the value labeled 'Authorized
Groups:' in the PORT CHARACTERISTICS display.