单项选择题
Two sites are using a multisite centralized call processing model. The voice gateway on the remote branch has lost IP connectivity to its Cisco CallManager server. Which feature enables the remote gateway to take the role of the call agent during the WAN failure？ （）
A.automated alternate routing （AAR） B.Cisco CallManager Attendant Console C.real-time protocol （RTP） D.Survivable Remote Site Telephony （SRST）
多项选择题 WhichtwostatementsregardingtheWirelessLANSolutionEngine（WLSE）aretrue？（）
多项选择题 Whichthreemethodswouldhelppreventcriticalnetwork-trafficpacketlossonhighspeedinterfaces？（）
多项选择题 Whichtwostatementsbestdescribeenhancedwirelesssecurityencryption？（）
