The returned AP mac whitelist list when query AP mac whitelist in
batch. The mac is storaged in the list one by one,and no separator.
For example, if the start number is 10, and the query number is
50, then the host will find 50 valid mac whitelists from the 11th
valid mac whitelist.(Assume there are 100 mac whitelists in host.)
And each time the SNMP agent can get 128 mac whitelist at most.