多选题In a VoIP network， which three call signaling protocols are supported by the Cisco CallManager for call setup， call maintenance， and call teardown？（）AH323BUDPCRTPDTCPEMedia Gateway Control Protocol (MGCP)Fsession initiation protocol (SIP)

第1题：

Which IP telephony component provides call processing, such as signaling, that in a traditional voice network is provided by switching equipment, such as a PBX?（）

• A、Client-based software, such as CiscoSoftPhone
• B、Voice gateways, such as the Cisco VG248 Analog Phone Gateway
• C、Call-management hardware and software, such as CiscoCallManager
• D、Advanced call-handling software, such as Cisco Unity

第2题：

Which three functions are associated with a Cisco Unified CallManager？ （）

• A、 connects traditional telephony devices to voice over IP infrastructure
• B、 converts analog signals to digital format
• C、 performs voice compression
• D、 performs call processing
• E、 performs dial plan administration
• F、 performs signaling and device control

第3题：

第4题：

Which statement is true about the distributed call control in a VoIP network？（）

• A、the VoIP endpoints have the intelligence to set up and control calls
• B、Call setup and control functionality is centralized in one call agent or cluster
• C、Call setup and control resides in call agents that are distributed throughout the network
• D、Each VoIP device has separate call control， voice packetization， and transport mechanisms

第5题：

In CRS Administration, when you add a JTAPI Call Control Group, what is created on the Cisco CallManager?（）

• A、CallManager Call Control Group  
• B、CRS CTI Route Point  
• C、CRS JTAPI User  
• D、CTI ports  
• E、CRS Call Control Group  
• F、CTI Route Points and directory numbers 

第6题：

Which two statements are true about CAC？（）

• A、CAC is implemented in the call setup phase to allocate bandwidth resources
• B、CAC is implemented in the call maintenance phase to allocate bandwidth resources
• C、CAC is utilized during the call teardown phase to ensure that all resources have been released
• D、CAC uses the Cisco RSVP （Resource Reservation Protocol） Agent to integrate call-processing capabilities with the underlying network infrastructure
• E、CAC is implemented in the call setup phase to determine the destination of the call

第7题：

Which functionality in the Cisco IOS software will enable a router to permanently act as a call agent for phones？ （）

• A、Cisco CallManager
• B、Cisco CallManger Express （CME）
• C、Cisco CallManager Gateway （CMG）
• D、Cisco CallManager Voice Gateway （CMVG）
• E、Media Gateway Control Protocol （MGCP）

第8题：

Which IP telephony component provides call processing, such as signaling, that in a traditional voice network is provided by switching equipment, such as a PBX?（）

• A、Advanced call-handling software, such as Cisco Unity
• B、Call-management hardware and software, such as CiscoCallManager
• C、Client-based software, such as CiscoSoftPhone
• D、Voice gateways, such as the Cisco VG248 Analog Phone Gateway

第9题：

What are two reasons to implement H·323 gatekeepers？（）

• A、 to eliminate the need for VoIP gateways
• B、 to scale a VoIP installation with multiple gateways
• C、 to provide call admission control and limit the number of simultaneous calls on the network 
• D、 to meet the requirement to control H·323 gateways on a LAN
• E、 to accept call requests and reduce the load on the gateway

第10题：

When calls are denied by call admission control （CAC）， the calls are rerouted through the PSTN via the use of which Cisco CallManager feature？（）

• A、automated alternate routing （AAR）
• B、Cisco CallManager Attendant Console
• C、real-time protocol （RTP）
• D、Survivable Remote Site Telephony （SRST）