单项选择题
A.QoS pre-classify permits making QoS decisions based on elements from the unencrypted IP packet.
B.QoS pre-classify is required when encrypting voice.
C.QoS pre-classify is an advantage to Service Providers transporting encrypted packets.
D.QoS pre-classify is not designed for IPSec/GRE configurations.
单项选择题 WhenshouldyouenableNetworkAddressTranslationTransparency(NAT-T)ontheTeleworker?（）
多项选择题 Refer to the exhibit. A customer indicates their teleworkers plan to use IP phones in their home offices. The IT department has surveyed the planned teleworkers, resulting in the user groupings shown in the exhibit. To provide the highest voice quality, the best recommendations to this customer are（）.
单项选择题 EasyVPNoperatesintwomodes.AlthoughClientModehasadvantages,thereareenvironmentswhereitshouldnotbeused.（）