A question about voice VLAN with the possibility of two answers. (Choose two)
A. The voice VLAN must be on a different VLAN database.
B. The voice VLAN must be configured on a trusted port.
C. The voice VLAN must be configured on an untrusted port.
D. The voice VLAN must be on the same VLAN database.
Answer: B D
Question 2How can you mitigate attacks in which the attacker attaches more than one VLAN tag to a packet?
A. Disable EtherChannel.
B. Enable transparent VTP on the switch.
C. Explicitly identify each VLAN allowed across the trunk.
D. Assign an access VLAN to every active port on the switch.
Which three VLANs are part of the extended range of available VLANs? (Choose three)
Answer: A D E
Normal range VLANs are from 1 to 1005 (in which VLANs 1002 to 1005 are Cisco defaults for FDDI and Token Ring. You cannot delete these VLANs). Extended range VLANs are from 1006 to 4094.
Question 4Which two commands enable you to determine the native VLAN that is configured on an interface? (Choose two)
A. show interface status
B. show interfaces
C. show interface trunk
D. show running-config
E. show interface brief
Answer: C D
Which two commands do you enter to add VLAN 20 on a switch VLAN configuration file? (Choose two) (Or How to add VLAN 20 on switch VLAN configuration file?)
A. switchport trunk native vlan 20
B. switchport access vlan 20
C. vlan 20
D. switchport trunk allowed vlan 20
E. encapsulation dot1q 20
Answer: B C
If VLAN 20 has not been created in the switch then the command “switchport access vlan 20” will automatically create this VLAN.
Refer to exhibit.
Switches A, B, C and D are connected via access ports. What two actions will you do to cater future expansion of VLAN due to large number of users.
A. Change the access link to trunk ports
B. Configure access VLAN 3 in each switch
C. Configure VTP transparent
How many VLANs can be assigned to a user access port configured for VoIP?
You can configure an access port with an attached Cisco IP Phone to use one VLAN for voice traffic and another VLAN for data traffic from a device attached to the phone -> Therefore we can configure two VLANs in total.
Which two statements about normal-range VLANs are true? (Choose two)
A. You can delete VLANs 1002 through 1005 in transparent mode only.
B. The vlan dat file is stored in RAM and copied to the NVRAM when you save the configuration.
C. Configurations are saved in the vlan.dat file.
D. You can add, modify, and remove configurations in VTP server mode and VTP client mode.
E. You can add VLANs in VTP server mode.
Answer: C E
Normal range VLANs are from 1 to 1005 (in which VLANs 1002 to 1005 are Cisco defaults for FDDI and Token Ring. You cannot delete these VLANs). Extended range VLANs are from 1006 to 4094. When you configure VLANs in VLAN database mode, the VLAN configuration is saved in the vlan.dat file, not the running-config or startup-config files.
When the switch is in VTP server or transparent mode, you can configure VLANs in the VLAN database mode.
Which three statements about extended VLANs are true? (Choose three)
A. The lowest extended VLAN number is 1006.
B. The lowest extended VLAN number is 1002.
C. Any VLAN ID can be used as an extended VLAN.
D. They are recognized only by VTP version 3.
E. They are propagated by VTP by default.
F. They require the extended system ID to be enabled on the device.
Answer: A D F
VTPv3 supports for extended VLAN range (VLANs 1006 to 4094). VTP versions 1 and 2 only supports VLANs 1 to 1005. If extended VLANs are configured, we cannot convert from VTP version 3 to version 1 or 2. VTP version 3 saves extended-range VLANs in the VLAN database.
If you configure extended VLANs, you must also enable the spanning-tree extended system-ID feature (with the command “spanning-tree extend system-id”).
Which two statements about native VLANs are true? (Choose two)
A. All outgoing traffic without a VLAN tag is tagged with the native VLAN.
B. All untagged traffic that arrives on the device is placed into the native VLAN.
C. The VLAN tag is stripped from all incoming traffic that matches the native VLAN.
D. They are propagated through VTP.
E. The default native VLAN is VLAN 11.
F. All incoming traffic that matches the native VLAN is dropped at the switch.
Answer: B D
Which protocol is used to propagate voice VLANs to a Cisco phone?
E. Cisco Discovery Protocol
Which two control protocols use the native VLAN 1 by default? (Choose two)
Answer: A B
CDP and VTP are always use VLAN 1 even if we change the native VLAN to another VLAN.