问答题
Authenticationforuserdatatrafficisimportant,butsoisauthenticationforIPvoicetraffic.TheCisco830802.1featureprovidesaneasiermethodforallowingIPvoicetrafficthroughtheVPN,becauseit().
A.requiresaccessliststoidentifythevoicetraffic
B.canallowtrafficfromadevicewithout802.1Xauthentication,byMACaddress
C.canallowtrafficfromCiscoIPphonesbylisteningtotheirCDPadvertisements
D.allowsallpacketsmarkedwithaToSof5tobypassauthentication
E.allowsallIPvoicepacketstobypassauthenticationviastatefulinspection