Which of the following statements regarding OSPF authentication commands are true? (Multiple Choice)
A . A ciphertext password can be entered, the effect is equivalent.
B . The ospf authentication-mode md5 1 huawei command has the same function as the ospf authentication-mode md5 1 plain huawei command.
C . When an authentication password is configured for area authentication and interface authentication separately, the password configured for area authentication takes effect.
D . The ospf authentication-mode simple huawei command has the same function as the ospf authentication-mode simple plain huawei command.
Answer: AD