问答题

Authenticationforuserdatatrafficisimportant,butsoisauthenticationforIPvoicetraffic.TheCisco830802.1featureprovidesaneasiermethodforallowingIPvoicetrafficthroughtheVPN,becauseit().

A.requiresaccessliststoidentifythevoicetraffic
B.canallowtrafficfromadevicewithout802.1Xauthentication,byMACaddress
C.canallowtrafficfromCiscoIPphonesbylisteningtotheirCDPadvertisements
D.allowsallpacketsmarkedwithaToSof5tobypassauthentication
E.allowsallIPvoicepacketstobypassauthenticationviastatefulinspection
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