In a VoIP network， which three call signaling protocols are 

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、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：

You need to design router redundancy on the Company network.  Which three protocols could be  chosen for IP routing redundancy to protect against first-hop router failure？（）

• A、 GLBP
• B、 ICMP
• C、 MSTP
• D、 HSRP
• E、 VRRP
• F、 NHRP

第6题：

Which three QoS mechanisms can be configured to improve VoIP quality on a converged  network？（）

• A、The use of a queuing method that will give VoIP traffic strict priority over other traffic  
• B、The use of RTP header compression for the VoIP traffic.
• C、The proper classification and marking of the traffic as close to the source as possible
• D、The use of 802.1QinQ trunking for VoIP traffic
• E、The use of WRED for the VoIP traffic

第7题：

Refer to the exhibit.   What are three of the basic components of a VoIP network？（）

• A、software voice applications
• B、multipoint control unit （MCU）  
• C、gatekeeper  
• D、call agent
• E、interactive voice response （IVR） systems  
• F、softphones

第8题：

第9题：

Which three are characteristics of voice traffic in the Company VOIP campus network？（）

• A、TCP retransmits
• B、UDP priority
• C、Bursty
• D、Delay sensitive
• E、Greedy
• F、Drop sensitive

第10题：

In a VoIP network， which three call signaling protocols are supported by the Cisco CallManager for call setup， call maintenance， and call teardown？ （）

• A、 H·323
• B、 UDP
• C、 RTP
• D、 TCP
• E、 Media Gateway Control Protocol （MGCP）
• F、 session initiation protocol （SIP）