Which of the following description of the OSPF authentication command is correct?

Which of the following description of the OSPF authentication command is correct?
A . You can use cipher text instead when you enter your password. The effect is equivalent.
B . ospf authentication-mode md5 1 Huawei and ospf authentication-mode md5 1 plain Huawei command is equivalent
C . Configure passwords on both the area and the interface, which is based on the password configured on the area.
D . ospf authentication-mode simple Huawei and ospf authentication-mode simple plain Huawei command is equivalent

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Answer: AD