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

A . MCU B . Application server C . Gateway D . Gatekeeper

A .  Plan B .  design C .  implement D .  prepare

A . using DHCP snooping B . snooping the incoming 802.1Q VLAN tag C . using CDP D . snooping the CoS marking on the incoming frame

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

A .  Type 1 B .  Type 2 C .  FXS D .  FXO E .  E&M

A . plan B . design C . implement D . prepare

A . 90 milliseconds B . 120 milliseconds C . 150 milliseconds D . 240 millisecond

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

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

A .  Standard encoding techniques create an uncompressed digital data rate of 4000 bps. B .  Standard encoding techniques create an uncompressed digital data rate of 8000 bps. C .  Standard encoding techniques create an uncompressed digital data rate of 64，000 bps. D .  Voice quality is not a concern if compression is not used. E .  Two methods of quantization are linear and logarithmic. F .  Two methods of compression are u-law and a-law.

A . Cisco IOS gateways provide services such as address translation and network access control for the devices on the network B . Cisco IOS gateways provide services such as bandwidth management and accounting C . Cisco IOS gateways provide media termination and signal translation between the public switched telephone network （PSTN） and IP networks D . Cisco IOS gateways provide zone management for all registered endpoints in the network

A . Variable queue delays B . Packet drops C . Transmitting too many small packets D . Compressio

A .  Packets can arrive out of order. B .  Packets must take the same path to the destination. C .  Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic. D .  Packets can experience varying delays across the network. E .  Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.

A .  CAC is used to allocate enough bandwidth for the number of calls that are allowed on the VoIP network. B .  CAC is used to protect the quality of the voice calls by preventing call establishment if enough resources are not available on the network. C .  CAC provides queuing mechanisms for voice calls if the packets exceed the configured or budgeted rate. D .  In a VoIP network the CAC can be replaced with the LLQ QoS mechanism if it has been properly implemented.

A . Mis-routed packets B . Excess jitter C . Delay of critical traffic D . Packet loss due to congestion E . Data link layer broadcast storms F . FTP connections unsuccessful

A .  voice stream mixing for conference calling B .  voice gateway C .  call admission control D .  analog or digital phone interfaces E .  XML application services F .  large scale dial plan applicatio

A .  Voice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media  portion of the VoIP communication.   B .  Voice traffic data flow involves large volumes of large packets.   C .  Because a packet loss involves a small amount of data, voice traffic is less affected by packet  losses than traditional data traffic is.   D .  Voice packets are encapsulated in TCP segments to allow for proper sequencing during  delivery.  E .  Voice packets are very sensitive to delay and jitter.&e

A . Variable queue delays B . Packet drops C . Transmitting too many small packets D . Compressio

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 mechanism

A .  allows multiple access points to be connected wirelessly， without the need for a wired Ethernet network B .  replicates configuration parameters across access points in the cluster， while optimizing network performance C .  automatically configures wireless client devices via Wi-Fi Protected Setup D .  can get real-time traffic or bandwidth statistics from an access point within a cluster

A . Standard encoding techniques create an uncompressed digital data rate of 4000 bps. B . Standard encoding techniques create an uncompressed digital data rate of 8000 bps. C . Standard encoding techniques create an uncompressed digital data rate of 64，000 bps. D . Voice quality is not a concern if compression is not used. E . Two methods of quantization are linear and logarithmic. F . Two methods of compression are u-law and a-law.

A . The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardown B . The gateway voice-capable device has a local call routing table configured through a routing protocol. C . The gateway voice-capable device relies on a call agent to support call control. D . The gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.

A . H323 B . UDP C . RTP D . TCP E . Media Gateway Control Protocol (MGCP)   F . session initiation protocol (SIP)&e

A . Cisco IOS gateways provide services such as address translation and network access control for the devices on the networl B . Cisco IOS gateways provide services such as bandwidth management and accounting C . Cisco IOS gateways provide media termination and signal translation between the public switched telephone network （PSTN） and IP networks D . Cisco IOS gateways provide zone management for all registered endpoints in the network