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 

题目
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？ （）
A

the seventh call is routed via the PSTN

B

the call is denied and the original six （6） calls remain

C

the call is completed and the first call is dropped

D

the call is completed， but all calls have quality issues

E

the call is completed but the seventh call has quality issues

相似考题

1.The company ____ its sales by an average of 10% per year since its establishment in 1993.A、increasesB、increasedC、is increasingD、has increased

2.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

3.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

4.Acme Costume Company is connecting its manufacturing facilties to its stores with a small pointto-multipoint Frame Relay IP WAN. Little growth is expected in the network infrastructure.Up to this point the company has been using a dial-on-demand network. Dropping WAN costs, however, have led them to consider using a high-speed WAN solution to improve access. Which two routing protocols could you deploy to support the new larger network while keeping costs down?（）A.RIPB.RIPv2C.EIGRPD.OSPF

更多“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 ”相关问题

  • 第1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.

    正确答案:B

  • 第2题：

    What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）

    • A、codec
    • B、link speed
    • C、Layer 2 encapsulation
    • D、packet overhead （IP/UDP/RTP）
    • E、link delay
    • F、total number of simultaneous calls that are allowed

    正确答案:A,C,D

  • 第3题：

    Acme Company has offices around the country. With the use of Cisco Unified CallManager， the company has deployed a VoIP network in a multisite centralized configuration. Which IOS gateway feature should be deployed to enable VoIP devices to register with a local gateway and continue to function when the connection to the Cisco Unified CallManager is broken？ （）

    • A、gatekeeper multizone
    • B、Call Admission Control （CAC）
    • C、Automatic Alternate Routing （AAR）
    • D、Survivable Remote Site Telephony （SRST）

    正确答案:D

  • 第4题：

    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.

    正确答案:D

  • 第5题：

    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.

    正确答案:B,D

  • 第6题：

    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？（）
    A

    5

    B

    15

    C

    25

    D

    35

    E

    45

    F

    55


    正确答案： D
    解析： 暂无解析

  • 第7题：

    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？ （）
    A

    the seventh call is routed via the PSTN

    B

    the call is denied and the original six （6） calls remain

    C

    the call is completed and the first call is dropped

    D

    the call is completed， but all calls have quality issues

    E

    the call is completed but the seventh call has quality issues


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally， the phones work with great quality. However， during very busy times when all of the agents are on the phone at the same time， the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem？（）
    A

    large files are being downloaded over the WAN network

    B

    IP phone traffic is not being classified correctly

    C

    more bandwidth is required for the office LAN

    D

    Call Admission Control has not been implemented 

    E

    employees are watching videos over the internet

    F

    header compression is not being used


    正确答案： C
    解析： 暂无解析

  • 第9题：

    多选题
    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.


    正确答案： A,C
    解析： 暂无解析

  • 第10题：

    单选题
    Acme Company has several offices around the country. The company has deployed a VoIP network with Cisco Unified CallManager in a multisite centralized configuration but the is a requirement to place a call agent at some of the remote sites. Which IOS gateway feature should be deployed at the remote site to enable local call control？（）
    A

    Gatekeeper multizone

    B

    Call Admission Control （CAC）

    C

    Automatic Alternate Routing （AAR）

    D

    Survivable Remote Site Telephony （SRST）

    E

    Cisco Unified CallManager Express （CME）


    正确答案： C
    解析： 暂无解析

  • 第11题：

    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 Agent

    B

     Traffic policing

    C

     Call Admission Control

    D

     QoS Link Congestion Management

    E

     Oversubscription Link Detection


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Your company has a main office and five branch offices that are connected by WAN links. The  company has an Active Directory domain named contoso.com. Each branch office has a member  server configured as a DNS server. All branch office DNS servers host a secondary zone for  contoso.com.     You need to configure the contoso.com zone to resolve client queries for at least four days in the  event that a WAN link fails.   What should you do（）
    A

    Configure the Expires after option for the contoso.com zone to 4 days.

    B

    Configure the Retry interval option for the contoso.com zone to 4 days.

    C

    Configure the Refresh interval option for the contoso.com zone to 4 days.

    D

    Configure the Minimum （default） TTL option for the contoso.com zone to 4 days.


    正确答案： C
    解析： 暂无解析

  • 第13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

    正确答案:B,C

  • 第14题：

    Acme Company has several offices around the country. The company has deployed a VoIP network with Cisco Unified CallManager in a multisite centralized configuration but the is a requirement to place a call agent at some of the remote sites. Which IOS gateway feature should be deployed at the remote site to enable local call control？（）

    • A、Gatekeeper multizone
    • B、Call Admission Control （CAC）
    • C、Automatic Alternate Routing （AAR）
    • D、Survivable Remote Site Telephony （SRST）
    • E、Cisco Unified CallManager Express （CME）

    正确答案:E

  • 第15题：

    Sun Stable is a global insurance company with headquarters located in Houston， Texas. Thecampus there is made up of a number of office buildings located within the same vicinity. In 2003，a new building. Building 331B was added. The additional building houses approximately 1000 employees. Ratherthan deploy a private branch exchange （PBX） in the new building， Sun Stable has decided toimplement an IP telephony solution. External calls will be carried across a MAN link to anotherbuilding， where a gateway connects into the worldwide PBX network of Sun Stable. Voice mail andunified messaging components are required and all IP phones and workstations should be on separate VLANs and IP subnets. ActualTests.comWhich IP telephony deployment best suits their need？（）

    • A、 single-site
    • B、 multisite with centralized call processing
    • C、 multisite with distributed call processing
    • D、 clustering over the WAN

    正确答案:A

  • 第16题：

    A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally， the phones work with great quality. However， during very busy times when all of the agents are on the phone at the same time， the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem？（）

    • A、large files are being downloaded over the WAN network
    • B、IP phone traffic is not being classified correctly
    • C、more bandwidth is required for the office LAN
    • D、Call Admission Control has not been implemented 
    • E、employees are watching videos over the internet
    • F、header compression is not being used

    正确答案:D

  • 第17题：

    Your company has a main office and five branch offices that are connected by WAN links. The  company has an Active Directory domain named contoso.com. Each branch office has a member  server configured as a DNS server. All branch office DNS servers host a secondary zone for  contoso.com.     You need to configure the contoso.com zone to resolve client queries for at least four days in the  event that a WAN link fails.   What should you do（）

    • A、Configure the Expires after option for the contoso.com zone to 4 days.
    • B、Configure the Retry interval option for the contoso.com zone to 4 days.
    • C、Configure the Refresh interval option for the contoso.com zone to 4 days.
    • D、Configure the Minimum （default） TTL option for the contoso.com zone to 4 days.

    正确答案:A

  • 第18题：

    多选题
    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


    正确答案： A,D
    解析： 暂无解析

  • 第19题：

    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.


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    Sun Stable is a global insurance company with headquarters located in Houston, Texas. The campus there is made up of a number of office buildings located within the same vicinity. In 2003, a new building, Building 331B was added. The additional building houses approximately 1000 employees. Rather than deploy a private branch exchange (PBX) in the new building, Sun Stable has decided to implement an IP telephony solution. External calls will be carried across a MAN link to another building, where a gateway connects into the worldwide PBX network of Sun Stable. Voice mail and unified messaging components are required and all IP phones and workstations should be on separate VLANs and IP subnets.Which IP telephony deployment best suits their need?（）
    A

    single-site.

    B

    multisite with centralized call processing

    C

    multisite with distributed call processing

    D

    clustering over the WAN


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    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， allcalls 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 priority queue.

    D

    Increase the policing rate for the priority queue.


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Acme Company has several offices around the country. The company has deployed a VoIP network with Cisco Unified CallManager in a multisite centralized configuration but there is a requirement to place a call agent at some of the remote sites. Which IOS gateway feature should be deployed at the remote site to enable local call control？（）
    A

     Gatekeeper multizone

    B

     Call Admission Control （CAC）

    C

     Automatic Alternate Routing （AAR）

    D

     Survivable Remote Site Telephony （SRST）

    E

     Cisco Unified CallManager Express （CME）


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    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.


    正确答案： B
    解析： 暂无解析

  • 第24题：

    单选题
    Sun Stable is a global insurance company with headquarters located in Houston， Texas. Thecampus there is made up of a number of office buildings located within the same vicinity. In 2003，a new building. Building 331B was added. The additional building houses approximately 1000 employees. Ratherthan deploy a private branch exchange （PBX） in the new building， Sun Stable has decided toimplement an IP telephony solution. External calls will be carried across a MAN link to anotherbuilding， where a gateway connects into the worldwide PBX network of Sun Stable. Voice mail andunified messaging components are required and all IP phones and workstations should be on separate VLANs and IP subnets. ActualTests.comWhich IP telephony deployment best suits their need？（）
    A

     single-site

    B

     multisite with centralized call processing

    C

     multisite with distributed call processing

    D

     clustering over the WAN


    正确答案： B
    解析： 暂无解析

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