关于Voice VLAN的工作模式,说法正确的有()。A、Voice VLAN的工作模式包含自动和手动两种B、自动模式下,系统会识别IP Phone发出的报文,如果匹配为语音报文,则将连接IP Phone的端口加入Voice VLANC、手动模式下,需要手工将IP Phone加入Voice VLAN中D、手动模式下,系统将不会向端口下发ACL

题目

关于Voice VLAN的工作模式,说法正确的有()。

  • A、Voice VLAN的工作模式包含自动和手动两种
  • B、自动模式下,系统会识别IP Phone发出的报文,如果匹配为语音报文,则将连接IP Phone的端口加入Voice VLAN
  • C、手动模式下,需要手工将IP Phone加入Voice VLAN中
  • D、手动模式下,系统将不会向端口下发ACL

相似考题
参考答案和解析
正确答案:A,B,C
更多“关于Voice VLAN的工作模式,说法正确的有()。A、Voice VLAN的工作模式包含自动和手动两种B、自动模式下,系统会识别IP Phone发出的报文,如果匹配为语音报文,则将连接IP Phone的端口加入Voice VLANC、手动模式下,需要手工将IP Phone加入Voice VLAN中D、手动模式下,系统将不会向端口下发ACL”相关问题
  • 第1题:

    简述缺省VLAN在不同端口模式(ACCess、Hybrid、TrUNk)下的概念,以及报文收发处理方式。


    正确答案: ACCess端口只属于1个VLAN,所以它的缺省VLAN就是它所在的VLAN,不用设置;
    Hybrid端口和TrUNk端口属于多个VLAN,所以需要设置缺省VLANID。缺省情况下,Hybrid端口和TrUNk端口的缺省VLAN为VLAN1
    如果设置了端口的缺省VLANID,当端口接收到不带VLANTAg的报文后,则将报文转发到属于缺省VLAN的端口;当端口发送带有VLANTAg的报文时,如果该报文的VLANID与端口缺省的VLANID相同,则系统将去掉报文的VLANTAg,然后再发送该报文。

  • 第2题:

    You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN?()

    • A、IP phones require inline power and must be in separate VLAN to receive inline power
    • B、IP telephony applications require prioritization over other traffic as they are more delaysensitive
    • C、IP phones can only receive IP addresses through DHCP if they are in separate VLAN
    • D、The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vlan

    正确答案:B

  • 第3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:A,D,F

  • 第4题:

    关于Voice VLAN的端口过滤模式,说法正确的有()。

    • A、Voice VLAN的端口过滤模式可以分为安全模式和普通模式两种
    • B、对于普通模式下,端口力口入Voice VLAN后设备不再检验报文的MAC地址
    • C、安全模式下,设备将对每一个要进入Voice VLAN传输的报文都进行MAC匹配检査
    • D、缺省情况下,Voice VLAN工作在普通模式

    正确答案:A,B,C

  • 第5题:

    在AWS上配置VOICE VLAN时,service type选择()。

    • A、RB VLAN
    • B、L2 Terminated VLAN
    • C、Stacking VLAN
    • D、Voice VLAN

    正确答案:D

  • 第6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7题:

    Which of the following is not information provided from an IP phone to a Catalyst switch using  CDP?()

    • A、 device PoE requirements
    • B、 device IP address
    • C、 device voice VLAN ID
    • D、 device platform

    正确答案:C

  • 第8题:

    单选题
    You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN?()
    A

    IP phones require inline power and must be in separate VLAN to receive inline power

    B

    IP telephony applications require prioritization over other traffic as they are more delaysensitive

    C

    IP phones can only receive IP addresses through DHCP if they are in separate VLAN

    D

    The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vlan


    正确答案: B
    解析: 暂无解析

  • 第9题:

    单选题
    What protocol does an IP phone use to learn the voice VLAN ID it should use for voice traffic?()
    A

    VTP

    B

    802.1 q

    C

    CDP

    D

    Skinny Station Protocol


    正确答案: A
    解析: 暂无解析

  • 第10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: A,E
    解析: 暂无解析

  • 第11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: B
    解析: 暂无解析

  • 第12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: B
    解析: 暂无解析

  • 第13题:

    During voice implementation,  which two required items are configured at an access layer switch connected to an IP phone to provide VoIP communication?()

    • A、allowed codecs
    • B、native VLAN
    • C、auxiliary VLAN
    • D、Cisco Unified Communications Manager IP address
    • E、RSTP

    正确答案:B,C

  • 第14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15题:

    关于AH、ESP的传输和隧道模式,下列描述正确的有()

    • A、在传输模式下,AH协议验证IP报文的数据部分和IP报头中的不变部分
    • B、在隧道模式下,AH协议验证全部的原始IP报文和封装后新IP头中的不变部分
    • C、在传输模式下,ESP协议对IP报文的有效数据进行加密
    • D、在隧道模式下,ESP协议对整个原始IP报文进行加密

    正确答案:A,B,C,D

  • 第16题:

    如果交换机的某个端口下同时开启了基于端口的VLAN、基于MAC地址的VLAN、基于协议的VLAN和基于IP子网的VLAN,则缺省情况下,VLAN将按照顺序进行匹配()。

    • A、端口VLAN>MAC VLAN协议>VLAN IP>子网VLAN
    • B、端口VLAN >P子网>VLAN端口>VLAN MAC VLAN
    • C、MAC VLAN>端口VLAN>协议VLAN>子网VLAN
    • D、MAC VLAN>子网VLAN>协议VLAN>端口VLAN

    正确答案:D

  • 第17题:

    如何将 en.1.1.x设置成三个IP ,三个VLAN ,一个端口的工作模式,并将VLAN tag 打开 IP 地址分别为 10.2.2.1 ,10.2.3.1,10.2.4.1 子网掩码 都为255.255.255.0 VLAN ID 分别为 200 (sig),201(voice),202(oam);


    正确答案:create ip if en.1.1.1 10.2.2.1 255.255.255.0 control create ip if en.1.1.2 10.2.3.1 255.255.255.0 voice create ip if en.1.1.3 10.2.4.1 255.255.255.0 oam def snmp config ip 10.2.4.1 def mg mg ip 10.2.2.1 diag l2s set 0xc8 0xc9 0xca 0x03 0xc8 0xc9 0x1 0x是16㻌ए

  • 第18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19题:

    What protocol does an IP phone use to learn the voice VLAN ID it should use for voice traffic?()

    • A、VTP
    • B、802.1 q
    • C、CDP
    • D、Skinny Station Protocol

    正确答案:C

  • 第20题:

    单选题
    Which of the following is not information provided from an IP phone to a Catalyst switch using  CDP?()
    A

     device PoE requirements

    B

     device IP address

    C

     device voice VLAN ID

    D

     device platform


    正确答案: A
    解析: 暂无解析

  • 第21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22题:

    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.


    正确答案: A,D
    解析: 暂无解析

  • 第23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,A
    解析: 暂无解析