Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?（）A、Incoming Call Reply, Incoming Call Request, Incoming Call ConnectedB、Incoming Call Reply, Incoming Call Connected, Incoming Call RequestC、Incoming Call Request, Incoming Call Reply, Incoming Call ConnectedD、Incoming Call Request, Incoming Call Connected, Incoming Call Reply
Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?（）
- A、Incoming Call Reply, Incoming Call Request, Incoming Call Connected
- B、Incoming Call Reply, Incoming Call Connected, Incoming Call Request
- C、Incoming Call Request, Incoming Call Reply, Incoming Call Connected
- D、Incoming Call Request, Incoming Call Connected, Incoming Call Reply
相关考题：
Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?() A.Incoming Call Reply, Incoming Call Request, Incoming Call ConnectedB.Incoming Call Reply, Incoming Call Connected, Incoming Call RequestC.Incoming Call Request, Incoming Call Reply, Incoming Call ConnectedD.Incoming Call Request, Incoming Call Connected, Incoming Call Reply
When you enter the interface command auto qos voip cisco－phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port?() A. by snooping the CoS marking on the incoming framesB. by using RTP hello messages between the switch port and the Cisco IP PhoneC. by using CDPD. by using DHCP snoopingE. by snooping the incoming 802.1Q VLAN tag
ZLB（Zero-Length Bod）消息是一个只有L2TP头的控制消息，其作用是作为一个明确应答，以确保控制消息的可靠传递。以下四种情况中，LNS不发送ZLB消息给LAC作为应答的有（）。A、LNS收到LAC发送CDN（Call-Disconnect-Notif，呼叫断开通知）消息后B、LNs收到LAC发连的ICCN（Incoming-Call-Connectea，呼叫已连接）消息后C、LNS收到LAC发送的Hello控制消息后D、LNS收到LAC发连的StopCCN（scop-Control-Connection-Notiflcation）；消息后
Which statement is true about a distributed call control environment and the processing of dialed digits from an IP phone？（）A、The router that is directly connected to the IP phone will look up the called number in its call routing table.B、The router that is directly connected to the IP phone will inform its call agent when a service request is detected.C、When the IP phone is picked up，the IP phone initiates the service request.D、The directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.
When you enter the interface command auto qos voip cisco-phone on a port at the edge of a network,how does the Cisco Catalyst switch detect if a Cisco IP Phone is connected to the port?（）A、by snooping the CoS marking on the incoming framesB、by using RTP hello messages between the switch port and the Cisco IP PhoneC、by using CDPD、by using DHCP snoopingE、by snooping the incoming 802.1Q VLAN tag
The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）A、the seventh call is routed via the PSTNB、the call is denied and the original six （6） calls remainC、the call is completed and the first call is droppedD、the call is completed， but all calls have quality issuesE、the call is completed but the seventh call has quality issues
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 callsB、Call setup and control functionality is centralized in one call agent or clusterC、Call setup and control resides in call agents that are distributed throughout the networkD、Each VoIP device has separate call control， voice packetization， and transport mechanisms
L2TP建立隧道时使用的消息有（）A、SCCRQ（Session-Control-Connecting-Request）B、SCCRP（Session-Control-Connecting-Reply）C、ICRQ（Incoming-Call-Request）D、ICRP（Incoming-Call-Reply）
When onsite repairing a printer the technicians cell phone rings and it is a personal call， how should the technician handle this？（）A、Answer the call and talk to your friend at the customer site.B、Answer the call and tell the friend you will call them later.C、Let it go to voicemail， call them back between service calls.D、Let it ring and call the friend back when the customer leaves.
In UCSM, where are Call Home conditions for monitoring configured?（）A、Call Home Service ProfilesB、Call Home PoliciesC、Call Home EventsD、Call Home Traps
Which Cisco UCS feature enables the administrator to send specific functional data using call home?（）A、call home port groupsB、call home alert groupsC、call home threshold groupsD、call home profiles
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·323B、 UDPC、 RTPD、 TCPE、 Media Gateway Control Protocol （MGCP）F、 session initiation protocol （SIP）
Which of the following are functions that are often provided by an ITSP but are not typically provided by the PSTN？（）A、 QoSB、 call setup and teardownC、 call routingD、 call supervisionE、 audio signal compression
Which statement describes the distributed call control model in VoIP networks？（）A、The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownB、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.
The above bgp configuration has what effect on the configured router？（）A、Allows incoming TCP connections destined to port 179B、Allows incoming TCP connections sourced from port 179C、Allows incoming TCP connections from 1.1.1.1 and destined to，or sourced from port 179D、Allows incoming TCP connections from 1.1.1.1 that are destined to port 179E、Allows incoming TCP connections from 1.1.1.1 that are sourced from port 179
Which IP telephony deployment model uses an H.225 Gatekeeper-Controlled trunk for call admission control within existing H.323 environments?（）A、single site with centralized call processingB、single site with distributed call processingC、multisite with centralized call processingD、multisite with distributed call processing
While accessing the Internet in an external environment (i.e. while traveling), a Windows 7 firewall hould be set to which of the following?（）A、Block incoming and outgoing connectionsB、Turned off or disabledC、Block outgoing connectionsD、Block incoming connections
Which two are characteristics of the Intercepting Filter pattern？（）A、 it provides centralized request handling for incoming requests.B、 It forces resource authentication to be distributed across web components.C、 It reduces coupling between presentation-tier clients and underlying business services.D、 It can be added and removed unobtrusively， without requiring changes to existing code.E、 It allows preprocessing and postprocessing on the incoming requests and outgoing responses.
多选题Which two are characteristics of the Intercepting Filter pattern？（）Ait provides centralized request handling for incoming requests.BIt forces resource authentication to be distributed across web components.CIt reduces coupling between presentation-tier clients and underlying business services.DIt can be added and removed unobtrusively， without requiring changes to existing code.EIt allows preprocessing and postprocessing on the incoming requests and outgoing responses.
多选题Which two are functions of an IP voice gateway?（）Aprovide far-end call controlBprovide far-end camera controlCtranslate analog voice to packetized voiceDtransition call path between different networksEprovide locations-based call admission control
单选题The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）Athe seventh call is routed via the PSTNBthe call is denied and the original six （6） calls remainCthe call is completed and the first call is droppedDthe call is completed， but all calls have quality issuesEthe call is completed but the seventh call has quality issues
单选题Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?（）AIncoming Call Reply, Incoming Call Request, Incoming Call ConnectedBIncoming Call Reply, Incoming Call Connected, Incoming Call RequestCIncoming Call Request, Incoming Call Reply, Incoming Call ConnectedDIncoming Call Request, Incoming Call Connected, Incoming Call Reply
单选题Which statement is true about a distributed call control environment and the processing of dialed digits from an IP phone？（）AThe router that is directly connected to the IP phone will look up the called number in its call routing table.BThe router that is directly connected to the IP phone will inform its call agent when a service request is detected.CWhen the IP phone is picked up，the IP phone initiates the service request.DThe directly connected router passes the collected digits to its call agent，and the call agent looks up in its call-routing table the called number.
单选题Which statement describes the distributed call control model in VoIP networks？（）AThe gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownBThe gateway voice-capable device has a local call routing table configured through a routing protocol.CThe gateway voice-capable device relies on a call agent to support call control.DThe gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.