For acceptable voice calls, the packet error rate should be less than（）%A、0.01B、0.1C、1D、2.5
For acceptable voice calls, the packet error rate should be less than（）%
- A、0.01
- B、0.1
- C、1
- D、2.5
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A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）A.Digital subscriber line (DSL)B.Optical networkC.Wireless local-area network (WLAN)D.Internet Protocol (IP) telephony
【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the termVoice ove IP in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as （） . The data transfer over the Internet is controlled by the （） . At corporate level, many companies have replaced their older internal telephone systerms with （） that oprerate over a local area network.A、voice over the internet B、voice over packet C、Voice over IP D、internet telephony A、packet B、internet protocol C、industry D、VoIp servers A、VoIP systems B、IP-enablde telephones C、VoIP servers D、routers
For acceptable voice calls， the packet error rate should be no higher than what value？（）A、0.1%B、1%C、2.5%D、25%
What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A、 Call Management Link AgentB、 Traffic policingC、 Call Admission ControlD、 QoS Link Congestion ManagementE、 Oversubscription Link Detection
Which two statements are true about voice ports on a router？ （）A、 Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports.B、 Calls to the PSTN can be made via FXS or T1/E1 trunk ports.C、 Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports.D、 Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.
Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls， what percentage of total bandwidth could VAD save？（）A、5B、15C、25D、35E、45F、55
A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）A、Optical networkB、Digital subscriber line (DSL)C、Internet Protocol (IP) telephonyD、Wireless local-area network (WLAN)
What is the Cisco recommended setting for the Cisco Unified Wireless Network WLC Voice Call Admission Control Max RF Bandwidth to support the Cisco Unified Wireless IP Phone 7921G?（）A、nominally 30 percent to best align with Cisco Unified Communications System recommendationsB、100 percent to ensure that the VoWLAN calls can use all the available bandwidth, if neededC、system default of 75 percentD、40 to 60 percentE、voice CAC should be left disabled unless wired QoS is configured
A branch router is configured with an egress QoS policy that was designed for a total number of 10 concurrent VOIP Calls. Due to Expansion， 15 VOIP Calls are now running over the link， but after the 14th call was established， all calls were affected and the voice quality was dramatically degraded. Assuming that there is enough bandwidth on the link for all of this traffic， which part of the QOS configuration should be updated due to the new traffic profile？（）A、Increase the shaping rate for the priority queue.B、Remove the policer applied on the priority queue.C、Remove the shaper applied on the preiority queue.D、Increase the policing rate for the priority queue.
Which statement most accurately describes the function of the Cisco Unity Express Auto Attendant?（）A、Auto Attendant answers calls and directs them to voice mail if the extension entered does not answer the call. B、Auto Attendant is designed to provide operator-like functionality for after-hour, weekend, and holiday operations. C、Auto Attendant will answer calls and will allow the caller to self-direct by entering the extension, entering the name, or dialing 0 for the operator. D、Auto Attendant will answer calls, collect digits, and forward calls to the operator for further processing.
Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）A、Increase the queue size of the voice class.B、Guarantee bandwidth during congestion to the voice class with a bandwidth command.C、Increase the tx-ring of the egress interface.D、Implement LLQ for the voice class.E、Decrease the rx-ring of the egress interface.F、Decrease the queue size of the voice class.
Which two statements are true about the function of CAC？（）A、CAC provides guaranteed voice quality on a link.B、CAC artificially limits the number of concurrent voice calls.C、CAC is used to control the amount of bandwidth that is taken by a call on a link.D、CAC prevents oversubscription of WAN resources that is caused by too much voice traffic.E、CAC allows an unlimited number of voice calls while severely restricting，if necessary，other forms of traffic.F、CAC solves voice congestion problems by using QoS to give priority to UDP traffic.
单选题Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls， what percentage of total bandwidth could VAD save？（）A5B15C25D35E45F55
多选题A documentary credit for usd 150,000 calls for a full set of bills of lading and an insurance certificate to cover all risks. The bill of lading presented indicates an on board date of 15 december. Which of the following insurance documents are acceptable？（）APolicy for usd 185，000BCertificate dated 17 decemberCDeclaration signed by a brokerDSubject to a franchise
多选题Which two statements are true about the function of CAC？（）ACAC provides guaranteed voice quality on a link.BCAC artificially limits the number of concurrent voice calls.CCAC is used to control the amount of bandwidth that is taken by a call on a link.DCAC prevents oversubscription of WAN resources that is caused by too much voice traffic.ECAC allows an unlimited number of voice calls while severely restricting，if necessary，other forms of traffic.FCAC solves voice congestion problems by using QoS to give priority to UDP traffic.
多选题Which two VoIP capabilities are utilized when the CallManager and the gateway are configured for Survivable Remote Site Telephony？（）AAnalog phones， connected to the PSTN， act as internal call agents if IP communication to the CallManager is lost.BAn onsite gateway reroutes calls over the PSTN if IP communication to the CallManager is lost.CThe IP phones can reroute calls over the PSTN if IP communication to the CallManager is lost.DLocal voice gateways can assume the function of a call agent if IP communication to the CallManager is lost.EIP phones use an internal call agent if IP communication to the CallManager is lost.
单选题Which statement is true about the Call Admission Control （CAC） feature in VoIP networks？（）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.
多选题Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）AIncrease the queue size of the voice class.BGuarantee bandwidth during congestion to the voice class with a bandwidth command.CIncrease the tx-ring of the egress interface.DImplement LLQ for the voice class.EDecrease the rx-ring of the egress interface.FDecrease the queue size of the voice class.
单选题For acceptable voice calls, the packet error rate should be no higher than what value?（）A0.1%B1%C2.5%D25%
单选题Which statement is true about IP telephony calls？（）A A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and Layer 2 link header.B The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.C Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice samples.D The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.
单选题A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）ADigital subscriber line (DSL)BOptical networkCWireless local-area network (WLAN)DInternet Protocol (IP) telephony
单选题What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）A Call Management Link AgentB Traffic policingC Call Admission ControlD QoS Link Congestion ManagementE Oversubscription Link Detection