要限制用户连接vty，只允许IP1.1.1.1可以连接，下面哪一个配置适用:
Aaccess-list1permit1.1.1.1 linevty04 access-class1in
Baccess-list1permit1.1.1.1255.255.255.255 linevty04 access-class1in
Caccess-list1permit1.1.1.10.0.0.0 linevty6670 access-class1in
Daccess-list1permit1.1.1.1 linevty04 access-group1in