Displays the MIB view bit mask. The length of the view bit mask is less than or
equal to the length of the subtree object identifiers (OID). If the length of this bit mask is less than the length of the subtree OID, it is extended by appending 1's to the end of the string to match the length of the subtree OID. Bit value 0 indicates that the corresponding identifier in the subtree OID is ignored and a value 1 indicates that the corresponding identifier in the subtree OID should match.