多选题Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？ （Choose  three.）（）AThe CoS value is trusted for 802.1p or 802.1q tagged traffic.BThe voice VLAN feature is disabled by default.CThe IP phone accepts the priority of

题目
多选题
Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？ （Choose  three.）（）
A

The CoS value is trusted for 802.1p or 802.1q tagged traffic.

B

The voice VLAN feature is disabled by default.

C

The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.

D

When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.

E

PortFast is automatically disabled when a voice VLAN is configured.

F

The default CoS value for incoming traffic is set to 0.

相似考题

1.Which three statements are true about the data traffic characteristics of voice traffic？ （）A、latency must be kept below 150 msB、latency is not a concern as long as jitter is kept below 30 msC、voice packets do not require a specific type of queuingD、voice packets are rather smallE、voice packets require TCP for rapid retransmission of dropped packetsF、voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload

2.Which two statements are true about the protocols that are used for transmitting voice traffic？（）A、RTP multiplexing is used to keep multiple phone conversations separateB、RTP provides end-to-end delivery services for voice trafficC、UDP is used to ensure a reliable transmission from sender to receiverD、RTP is used to provide resource reservation for the voice streamE、UDP provides multiplexing

3. You have configured voice VLANs on Catalyst switch R1.  Which two statements are true about the  operation of voice VLANs on this device？ （）A、 When the voice VLAN feature is enabled， all untagged traffic is sent according to the default  CoS priority of the port.B、 Enabling voice VLANs enables the switch to create multiple queues for traffic that is entering a  port.C、 When voice VLANs are configured on a trunk link， UplinkFast must also be enabled.D、 Voice VLANs are configured to enable the switch to forward frames marked with the proper  CoS values over separate physical links.E、 Enabling voice VLANs enables the switch to forward frames with a specific 802.1P marking.

4.Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）A、The three required steps in the analog to digital conversion are sampling，encoding，and compression.B、The three required steps in the analog to digital conversion are sampling，quantization，and compression.C、The three required steps in the analog to digital conversion are sampling，quantization，and encoding.D、The output of the sampling process is a pulse code modulation （PCM） signal.E、The output of the sampling process is a pulse amplitude modulation （PAM） signal.

更多“Which three statements are true about the voice VLAN feature”相关问题

  • 第1题：

    Which two statements are true about voice VLANs？（）

    • A、Voice VLANs are only used when connecting an IP phone and a host to distinct switch ports
    • B、Access ports that are configured with voice VLANs will always trust the CoS that is received from IP phones
    • C、Access ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phone
    • D、Voice VLANs are configured using the switchport voice vlan vlan-ID interface configuration command
    • E、Voice VLANs provide a trunking interface between an IP phone and an access port on a switch to allow traffic from multiple devices that are connected to the port
    • F、Enabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS markings

    正确答案:C,D

  • 第2题：

    Which three statements are true about terms in a policy?（）

    • A、The order of the terms in a policy is irrelevant
    • B、The action is specified in a then statement
    • C、Ters are optional in a policy
    • D、The match condition can be identified with a from statement
    • E、Every policy must contain at least one term

    正确答案:B,D,E

  • 第3题：

    Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？ （Choose  three.）（）  

    • A、 The CoS value is trusted for 802.1p or 802.1q tagged traffic.
    • B、 The voice VLAN feature is disabled by default.
    • C、 The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.
    • D、 When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.
    • E、 PortFast is automatically disabled when a voice VLAN is configured.
    • F、 The default CoS value for incoming traffic is set to 0.

    正确答案:B,D,F

  • 第4题：

    Which three characteristics are true about voice traffic in the campus network？ （）

    • A、TCP retransmits
    • B、benign
    • C、greedy
    • D、drop sensitive
    • E、smooth
    • F、delay insensitive

    正确答案:B,D,E

  • 第5题：

    Which three statements about subqueries are true? （）

    • A、Asinglerowsubquerycanretrieveonlyonecolumnandonerow.
    • B、Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.
    • C、Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.
    • D、Amultiplerowsubquerycanbecomparedusingthe"；>；"；operator.
    • E、AsinglerowsubquerycanusetheINoperator.
    • F、Amultiplerowsubquerycanusethe"；="；operator.

    正确答案:B,C,E

  • 第6题：

    多选题
    You have configured voice VLANs on Catalyst switch R1.  Which two statements are true about the  operation of voice VLANs on this device？ （）
    A

    When the voice VLAN feature is enabled， all untagged traffic is sent according to the default  CoS priority of the port.

    B

    Enabling voice VLANs enables the switch to create multiple queues for traffic that is entering a  port.

    C

    When voice VLANs are configured on a trunk link， UplinkFast must also be enabled.

    D

    Voice VLANs are configured to enable the switch to forward frames marked with the proper  CoS values over separate physical links.

    E

    Enabling voice VLANs enables the switch to forward frames with a specific 802.1P marking.


    正确答案： C,D
    解析： 暂无解析

  • 第7题：

    单选题
    Refer to the exhibit. Which statement is true about a voice VLAN？（）
    A

     Physically the voice network and the data network are separate.

    B

     The voice traffic will normally be on a different IP subnet than will the data traffic.

    C

     End user intervention is necessary to place the phone into the proper VLAN.

    D

     The same security policy should be implemented for both voice and data traffic.

    E

     The data VLAN must be configured as the native VLAN.


    正确答案： C
    解析： 暂无解析

  • 第8题：

    多选题
    Which two statements are true about the configuration of voice VLANs？（）
    A

    Static secure MAC addresses can be configured in conjunction with voice VLANs.

    B

    PortFast is automatically enabled when voice VLANs are configured.

    C

    PortFast must be manually configured when voice VLANs are configured.

    D

    Voice VLANs are typically configured on uplink ports.

    E

    Voice VLANs are typically configured on access ports.


    正确答案： D,C
    解析： 暂无解析

  • 第9题：

    多选题
    Which three statements are true about the data traffic characteristics of voice traffic？ （）
    A

    latency must be kept below 150 ms

    B

    latency is not a concern as long as jitter is kept below 30 ms

    C

    voice packets do not require a specific type of queuing

    D

    voice packets are rather small

    E

    voice packets require TCP for rapid retransmission of dropped packets

    F

    voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload


    正确答案： E,C
    解析： 暂无解析

  • 第10题：

    多选题
    You need to configure a new Company Catalyst 3560 switch for a VOIP-enabled office.  Which  three statements are true about the voice VLAN feature on this switch？（）
    A

    The default CoS value for incoming traffic is set up to 0.

    B

    The CoS value is trusted for 802.1p or 802.1q tagged traffic.

    C

    PortFast is automatically disabled when a voice VLAN is configured.

    D

    The voice VLAN feature is disabled by default.

    E

    The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.

    F

    When the voice VLAN feature is enabled， all untagged traffic is sent according to the default  CoS priority of the port


    正确答案： F,B
    解析： 暂无解析

  • 第11题：

    多选题
    Which two statements are true about voice VLANs？（）
    A

    Voice VLANs are only used when connecting an IP phone and a host to distinct switch ports

    B

    Access ports that are configured with voice VLANs will always trust the CoS that is received from IP phones

    C

    Access ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phone

    D

    Voice VLANs are configured using the switchport voice vlan vlan-ID interface configuration command

    E

    Voice VLANs provide a trunking interface between an IP phone and an access port on a switch to allow traffic from multiple devices that are connected to the port

    F

    Enabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS markings


    正确答案： B,A
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following statements is NOT true about mass communication?
    A

    It can reach no further than human voice.

    B

    It can reach a large audience.

    C

    It is rapid and efficient.

    D

    It can be trusted.


    正确答案： B
    解析：
    最后一段指出思想传播的速度、距离和受众都发生了变化，大约200年前，人们所说的话并不能比其声音传播的更远，而非指的是mass communication（大众传媒）。

  • 第13题：

    The DAI feature has been implemented in the Company switched LAN.  Which three statements  are true about the dynamic ARP inspection （DAI） feature？ （）

    • A、 DAI can be performed on ingress ports only.
    • B、 DAI can be performed on both ingress and egress ports.
    • C、 DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.  
    • D、 DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP  caches of hosts in the domain.
    • E、 DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
    • F、 DAI is supported on access and trunk ports only.

    正确答案:A,C,E

  • 第14题：

    Which two statements are true about the configuration of voice VLANs？（）

    • A、Static secure MAC addresses can be configured in conjunction with voice VLANs.
    • B、PortFast is automatically enabled when voice VLANs are configured.
    • C、PortFast must be manually configured when voice VLANs are configured.
    • D、Voice VLANs are typically configured on uplink ports.
    • E、Voice VLANs are typically configured on access ports.

    正确答案:B,E

  • 第15题：

    Which statement is true about voice VLANs？ （）

    • A、When the voice VLAN feature is enabled， all untagged voice and data traffic is sent through the voice VLAN.
    • B、The voice VLAN feature is enabled by default.
    • C、The IP phone overrides the priority of all incoming data traffic （tagged and untagged） and sets the CoS value to 0.
    • D、The default CoS value is 1 for incoming voice and data traffic.

    正确答案:C

  • 第16题：

    Which three statements about the DHCP snooping feature on Cisco Nexus switches are true？ （）

    • A、 DHCP snooping commands are not available until the feature is enabled with the feature dhcp- snooping command.
    • B、 When you enable the DHCP snooping feature， the switch begins building and maintaining the DHCP snooping binding database.
    • C、 The switch will not validate DHCP messages received or use the DHCP snooping binding database to validate subsequent requests from untrusted hosts until DHCP snooping is enabled globally and for each specific VLAN.
    • D、 Globally disabling DHCP snooping removes all DHCP snooping configuration on the switch.
    • E、 Globally disabling DHCP snooping does not remove any DHCP snooping configuration or the configuration of other features that are dependent upon the DHCP snooping feature.

    正确答案:B,C,E

  • 第17题：

    多选题
    A hacker on the Company network is attempting to hop onto a different VLAN.  Which two  statements about VLAN hopping are true？ （）
    A

    An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation.

    B

    Configuring an interface with the switchport mode dynamic command will prevent VLAN  hopping.

    C

    Attacks are prevented by utilizing the port-security feature.

    D

    Configuring an interface with the switchport mode access command will prevent VLAN  hopping.

    E

    An end station attempts to redirect VLAN traffic by broadcasting multiple ARP requests.


    正确答案： A,D
    解析： 暂无解析

  • 第18题：

    多选题
    Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）
    A

    The three required steps in the analog to digital conversion are sampling，encoding，and compression.

    B

    The three required steps in the analog to digital conversion are sampling，quantization，and compression.

    C

    The three required steps in the analog to digital conversion are sampling，quantization，and encoding.

    D

    The output of the sampling process is a pulse code modulation （PCM） signal.

    E

    The output of the sampling process is a pulse amplitude modulation （PAM） signal.


    正确答案： B,E
    解析： 暂无解析

  • 第19题：

    多选题
    The DAI feature has been implemented in the Company switched LAN.  Which three statements  are true about the dynamic ARP inspection （DAI） feature？ （）
    A

    DAI can be performed on ingress ports only.

    B

    DAI can be performed on both ingress and egress ports.

    C

    DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.

    D

    DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP  caches of hosts in the domain.

    E

    DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.

    F

    DAI is supported on access and trunk ports only.


    正确答案： A,D
    解析： 暂无解析

  • 第20题：

    多选题
    Which three characteristics are true about voice traffic in the campus network？ （）
    A

    TCP retransmits

    B

    benign

    C

    greedy

    D

    drop sensitive

    E

    smooth

    F

    delay insensitive


    正确答案： D,A
    解析： 暂无解析

  • 第21题：

    多选题
    The Cisco AutoQoS feature is being used throughout the Company VOIP network.  Which three  statements about this feature are true？（）
    A

    The mls qos global configuration command must be entered before configuring AutoQoS.

    B

    CEF must be enabled.

    C

    The no auto qos voip command is used to disable Cisco AutoQos and revoke all  configurations generated by Cisco AutoQos.

    D

    CDP must be enabled.

    E

    SNMP must be enabled.


    正确答案： D,B
    解析： 暂无解析

  • 第22题：

    多选题
    Which three statements about subqueries are true? （）
    A

    Asinglerowsubquerycanretrieveonlyonecolumnandonerow.

    B

    Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.

    C

    Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.

    D

    Amultiplerowsubquerycanbecomparedusingthe；>；；operator.

    E

    AsinglerowsubquerycanusetheINoperator.

    F

    Amultiplerowsubquerycanusethe；=；operator.


    正确答案： D,A
    解析： 暂无解析

  • 第23题：

    单选题
    Refer to the exhibit. Which statement is true about a voice VLAN？（）
    A

    Physically the voice network and the data network are separate

    B

    The voice traffic will normally be on a different IP subnet than will the data traffic

    C

    End user intervention is necessary to place the phone into the proper VLAN

    D

    The same security policy should be implemented for both voice and data traffic

    E

    The data VLAN must be configured as the native VLAN


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    Which statement is true about voice VLANs？ （）
    A

    When the voice VLAN feature is enabled， all untagged voice and data traffic is sent through the voice VLAN.

    B

    The voice VLAN feature is enabled by default.

    C

    The IP phone overrides the priority of all incoming data traffic （tagged and untagged） and sets the CoS value to 0.

    D

    The default CoS value is 1 for incoming voice and data traffic.


    正确答案： C
    解析： 暂无解析

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