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全部科目 > 软件认证工程师考试 > 思科认证考试 > CCNP系列认证 > CCNP(642-631)

单项选择题

You review the failed attempts logs on an aaa server and find: "unknown network access server error." 
Which failure could produce this error?()

A.aaa client and aaa server handshake failure
B.supplicant authentication failure
C.wrong password used by the supplicant
D.failure of the wireless client and aaa server handshake

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