A.rwxr-xr-x3 user admin 1024 Sep 13 11:58 test
B.drwxr-xr-x 3 user admin 1024 Sep 13 11:58 test
C.rwxr-xr-x 3 admin user 1024 Sep 13 11:58 test
D.drwxr-xr-x 3 admin user1024 Sep 13 11:58 test
A.IP地址欺騙防護(hù)
B.NAT
C.訪問控制
D.SQL注入攻擊防護(hù)