A、1-99 B、100-199 C、200-299 D、300-399
A、255.255.240.0 B、255.255.255.0 C、0.0.15.255 D、0.0.0.255
A、ip access-list 101 out B、access-list ip 101 in C、ip access-group 101 in D、access-group ip 101 in