问答题

SelectthetwocorrectstatementsfromthelistbelowthatdescribeDESand3DES：（）

A.3DESismuchmoresecurethanDES.
B.BothDESand3DESarestreamciphers.
C.DESuses64bitkeys，althoughtheeffectivekeylengthisonly56bits.
D.ThedecryptionoperationforbothDESand3DESisthesameastheencryptionoperation.
E.DEScanonlybeusedforencryption，whereas3DEScanalsobeusedforauthentication.

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Whichtwostatementsbestdescribeenhancedwirelesssecurityencryption？（）

A.TKIPprotectsRC4encryptionkeys
B.CKIPandTKIPprotectAESencryptionkeys
C.TKIPencryptionismoreprocessorintensivethanAESencryptionis
D.WPArequiresTKIPencryption，whereasWPA2supportsAESencryption
E.WPArequiresAESencryption，whereasWPA2supportsTKIPencryption

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WhichofthefollowingATOMtrafficencapsulationsrequiretheuseofaControlWord？（）

A.Cellrelay
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