Which statement about vlan operation on cisco catalyst switches is true？（）

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• Which statement about VPLS is true？（）

  A . All CE devices emulate a bridge B . All provider devices emulate a bridge C . Hierarchical VPLS reduces signaling overhead D . Each PE device emulates a bridge E . Each CE device emulates a bridge

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• You need to design the VLAN scheme for the Company network. Which two statements are true  about best practices in VLAN design？（）

  A . Routing should occur at the access layer ifvoice VLANs are utilized. Otherwise， routing should occur at the distribution layer. B . Routing should always be performed at the distribution layer. C . VLANs should be localized to a switch. D . VLANs should be localized to a single switch unlessvoice VLANs are being utilized. E . Routing should not be performed between VLANs located on separate switches.

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• The Company security administrator is concerned with VLAN hopping based attacks. Which two  statements about these attacks are true？ （）

  A .  Attacks are prevented by utilizing the port-security feature. B .  An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation. C .  Configuring an interface with the switchport mode dynamic command will prevent VLAN  hopping. D .  An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q  encapsulation. E .  Configuring an interface with the "switchport mode access" command will prevent VLAN  hopping.

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• 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.

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• 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

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• Based on the show spanning-tree vlan 200 output shown in the exhibit， which two statements about the STP process for VLAN 200 are true？ （） https://assets.asklib.com/images/image2/2018073109163766061.jpg

  A . BPDUs will be sent out every two seconds. B . The time spent in the listening state will be 30 seconds. C . The time spent in the learning state will be 15 seconds. D . The maximum length of time that the BPDU information will be saved is 30 seconds. E . This switch is the root bridge for VLAN 200. F . BPDUs will be sent out every 10 seconds.

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• Which three statements are typical characteristics of VLAN arrangements?（）

  A . A new switch has no VLANs configured. B . Connectivity between VLANs requires a Layer 3 device. C . VLANs typically decrease the number of collision domains. D . Each VLAN uses a separate address space. E . A switch maintains a separate bridging table for each VLAN. F . VLANs cannot span multiple switches.

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• Refer to the exhibit. Which three statements are true about the voice VLAN configuration of the Catalyst switch？ （） https://assets.asklib.com/images/image2/2018073014461894379.jpg

  A . The packet priority received from a device that is connected to the phone will be unmodified. B . The packet priority received from a device that is connected to the phone will be overridden. C . Incoming CoS values in packets from the connected phone will be left unmodified. D . Packets without aCoS value that is set by the phone will be set to a value of 5. E . Incoming CoS values in packets from the connected phone will be reset to a value of 5. F . Packets without aCoS value that is set by the phone will be set to the default CoS value.

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• 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 marking

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• 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.

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• Refer to the exhibit. Which statement is true about a voice VLAN？（）https://assets.asklib.com/images/image2/2018072610051691343.jpg

  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

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• Which statement about NPIV is true？（）

  A .  NPIV provides a means to assign multiple Fibre Channel IDs to a single N-port. B .  NPIV can be enabled on a per-VSAN basis. C .  NPIV requires a "write erase" and then reload the switch in order to come up into NPIV mode.  D .  NPIV is a Cisco proprietary feature and as such works only between two Cisco switches. E .  NPIV must not be enabled on a switch that is also running N-port virtualization.

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• Refer to the exhibit. Which two statements are true about the output from the show standby vlan50 command？（）https://assets.asklib.com/images/image2/2018072614270865427.jpg

  A . The command standby 1 preempt was added to Catalyst_A B . Catalyst_A is load sharing traffic in VLAN 50 C . Hosts using the default gateway address of 192.168.1.1 will have their traffic sent to192.168.1.11 even after Catalyst_A becomes available again D . Hosts using the default gateway address of 192.168.1.2 will have their traffic sent toCatalyst_A

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• Given the above partial configuration, which two statements are true about VLAN traffic?（）https://assets.asklib.com/images/image2/2018072410275363766.jpg

  A . VLANs 1-5 will use fa0/10 as a backup only. B . VLANs 6-10 will use fa0/10 as a backup only. C . VLANs 1-5 will be blocked if fa0/10 goes down. D . VLANs 1-10 are configured to load share between fa0/10 and fa0/12. E . VLANs 6-10 have a port priority of 128 on fa0/10.

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• 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.

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• Which statement about RIPng is true?（）

  A . RIPng allows for routes with up to 30 hops. B . RIPng is enabled on each interface separately. C . RIPng uses broadcasts to exchange routes. D . There can be only one RIPng process per router.

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• Which statement about vlan operation on cisco catalyst switches is true?（）

  A . when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table. B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

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• 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.

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• A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

  A . For the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration. B . For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration. C . Direct inter-vlan communication does not require OSPF D . OSPF cannot be used if router-on-a-stick is configured on the router

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• Refer to the exhibit. Which statement is true about a voice VLAN？（）https://assets.asklib.com/images/image2/2018072410435948132.jpg

  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.

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• 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.

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• Which two statements describe the Cisco implementation of VLANs?（）

  A . VLAN 1 is the default Ethernet VLAN. B . CDP advertisements are only sent on VLAN 1002. C . By default, the management VLAN is VLAN 1005. D . By default, the switch IP address is in VLAN 1005. E . VLAN 1002 through 1005 are automatically created and cannot be deleted.

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• Which statement is most correct regarding vNICs and VLANs?（）

  A . only the default vlan has traffic that is tagged B . All vNICs have to be associated with one or more VLANs except for the default vlan C . vlan must be configured before configuring them into a vNIC D . Tagging is done by the operating system NIC if the flag is set to tag traffic

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• Which two statements about the use of VLANs to segment a network are true?（）

  A . VLANs increase the size of collision domains. B . VLANs allow logical grouping of users by function. C . VLANs simplify switch administration. D . VLANs enhance network security.

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