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单选题
Which security mechanism is employed only on the server-side to limit access to resources or components？（）
A
authorization
B
data integrity
C
confidentiality
D
authentication
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authorizationB
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单选题Which security mechanism is employed only on the server-side to limit access to resources or components？（）A
authorizationB
data integrityC
confidentialityD
authentication
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AuthorizationB
Data integrityC
ConfidentialityD
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It is applied only on the input interface of a router.B
It is applied only on the output interface of a router.C
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