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VLANs Flashcards

Study Vlans

1
Q 
Which feature is automatically enabled when a voice VLAN is configured, but not automatically disabled when a voice VLAN is removed?
A. portfast
B. port-security
C. spanning tree
D. storm control
A

A. portfast

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2
Q

In which portion of the frame is the 802.1q header found?
A. within the Ethernet header
B. within the Ethernet payload
C. within the Ethernet FCS
D. within the Ethernet source MAC address

A

A. within the Ethernet header

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3
Q

What is required for a LAN switch to support 802.1q Q-in-Q encapsulation?
A. Support less than 1500 MTU
B. Support 1504 MTU or higher
C. Support 1522 layer 3 IP and IPX packet
D. Support 1547 MTU only

A

B. Support 1504 MTU or higher

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4
Q 
What is the size of the VLAN field inside an 802.1q frame?
A. 8-bit
B. 12-bit
C. 16-bit
D. 32-bit
A

B. 12-bit

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5
Q 
What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN?
A. 0
B. 1
C. 2
D. 1024
A

B. 1

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6
Q

What does the command “vlan dot1q tag native” accomplish when configured under global configuration?

A. All frames within the native VLAN are tagged, except when the native VLAN is set to 1.
B. It allows control traffic to pass using the non-default VLAN.
C. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).
D. Control traffic is tagged.

A

D. Control traffic is tagged.

in fact no correct answer - WTF?

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7
Q

Interfaces are assigned to a VLAN, and then the VLAN is deleted. Which state are these interfaces in after the VLAN is deleted?
A. They remain up, but they are reassigned to the default VLAN.
B. They go down until they are reassigned to a VLAN.
C. They go down, but they are reassigned to the default VLAN.
D. They remain up, but they are reassigned to the native VLAN.

A

B. They go down until they are reassigned to a VLAN.

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8
Q 
Which feature is automatically configured when an administrator enables a voice VLAN?
A. 802.1Q trunking
B. PortFast
C. QoS
D. private VLANs
A

B. PortFast

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9
Q

Behavior of an access port when a tagged packet is received other than the access VLAN value.
A. ?
B. tag is removed and packet is forwarded of the VLAN mentioned in the tag
C. packet is dropped
D. tag is removed and packet is forwarded on the VLAN of the access port

A

C. packet is dropped

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10
Q

Which two statements are true about best practices in VLAN design? (Choose two)
A. Routing should occur at the access layer if voice VLANs are utilized. Otherwise, routing should occur at the distribution layer.
B. Routing may be performed at all layers but is most commonly done at the core and distribution layers.
C. Routing should not be performed between VLANs located on separate switches.
D. VLANs should be local to a switch.
E. VLANs should be localized to a single switch unless voice VLANs are being utilized.

A

B. Routing may be performed at all layers but is most commonly done at the core and distribution layers.
D. VLANs should be local to a switch.

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11
Q

A dynamic access port is member of which VLAN by default?
A. VLAN 1 is the default VLAN
B. none until the port VLAN is determined

A

B. none until the port VLAN is determined

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12
Q 
Which VLAN IDs are in the extended range? (Choose three)
A. 1006
B. 1001
C. 999
D. 4021
E. 3003
F. 99
A

A. 1006
D. 4021
E. 3003

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13
Q

Which configuration do you apply to an interface so that a host can be placed into VLAN593?

A. interface GigabitEthernet0/0.593
     encapsulation dot1q 593
     switchport access vlan 593
B. interface GigabitEthernet0/0
     switchport trunk encapsulation dot1q
     switchport trunk native vlan 593
     switchport access vlan 593
C. interface GigabitEthernet0/0
     switchport mode trunk
     switchport trunk allowed vlan 593
D. interface GigabitEthernet0/0
     switchport mode access
     switchport access vlan 593
     switchport host
A

D. interface GigabitEthernet0/0
switchport mode access
switchport access vlan 593
switchport host

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14
Q

Which two statements are true in regards to normal and extended range VLANs? (Choose two)
A. Normal range VLANs from 1-1005 are stored in vlan.dat.
B. Extended range VLANs from 1006-4096 are stored in the startup configuration.
C. Normal range VLANs from 1-1005 are stored in the startup configuration.
D. Extended range VLANs from 1006-4096 are stored in vlan.dat.
E. Both normal and extended VLANs are stored in vlan.dat file.

A

A. Normal range VLANs from 1-1005 are stored in vlan.dat.

B. Extended range VLANs from 1006-4096 are stored in the startup configuration.

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15
Q

Question about the behavior of VLAN 1 BPDUs in a situation where the native VLAN configured as VLAN 99 and the native VLAN is tagged. (Choose two)
A. Normal STP VLAN 1 BPDU travel across VLAN 99 untagged
B. PVST+ VLAN 1 BPDU travel across VLAN 99 tagged
C. Normal STP VLAN 1 BPDU travel across VLAN 1 untagged
D. PVST+ VLAN 99 BPDU travel across VLAN 99 tagged

A

B. PVST+ VLAN 1 BPDU travel across VLAN 99 tagged
D. PVST+ VLAN 99 BPDU travel across VLAN 99 tagged
(unsure about this one - Verify)

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16
Q

Which two statements about VLAN database are true? (Choose two)
A. It supports VLANs 1-1001.
B. It supports extended VLAN.
C. Information about VLANs are stored in the configuration.
D. It can have different VLANs with the same VLAN ID, but must have the same name.
E. It can be configured in VTP transparent, but must be in the VLAN database mode.

A

A. It supports VLANs 1-1001

E. It can be configured in VTP transparent, but must be in the VLAN database mode.

17
Q 
Which two VLAN ranges can you add, modify or delete on a switch? (Choose two)
A. VLANs 1-1001
B. VLANs 1005-4094
C. VLANs 1006-4094
D. VLANs 2-1001
E. VLANs 2-4094
A

C. VLANs 1006-4094

D. VLANs 2-1001

18
Q

Where does the VLAN information get saved to?
A. The information is saved to the vlan.dat file.
B. The information is saved to the running configuration file.
C. The information is saved to the vlan.txt file.
D. The information is saved to the vlan.conf file.

A

A. The information is saved to the vlan.dat file.

19
Q 
Which normal VLAN range are valid and is stored in the vlan.dat configuration file?
A. VLANs 1-1005
B. VLANs 1005-2030
C. VLANs 2094-4094
D. VLANs 4094-8030
A

A. VLANs 1-1005

20
Q 
Which extended VLAN range are valid and is stored in the startup configuration?
A. VLANs 1006-4096
B. VLANs 2006-6096
C. VLANs 1-1005
D. VLANs 1005-2060
A

A. VLANs 1006-4096

21
Q

Which two statements about native VLANs are true? (Choose two)
A. VLAN 1 and VLAN 1001 are native VLANs by default.
B. The native VLAN is untagged over trunks.
C. The native VLAN can be changed on a per port basis.
D. Only one VLAN can be the native VLAN on a device.
E. Cisco Discovery Protocol versions 1 and 2 can carry native VLAN information.

A

B. The native VLAN is untagged over trunks.

C. The native VLAN can be changed on a per port basis.

22
Q 
Which three of these VLANs are a valid extended VLAN? (Choose three)
A. 4095
B. 4096
C. 4094
D. 3000
E. 1006
F. 1005
A

C. 4094
D. 3000
E. 1006

23
Q

In which place do all VLANs get stored?

A. NVRAM: vlan.xml
B. FLASH: vlan.xml
C. NVRAM: vlan.txt
D. FLASH: vlan.txt
E. NVRAM: vlan.dat
F. FLASH: vlan.dat
A

F. FLASH: vlan.dat

24
Q 
Which file lists all of the configured VLANs on a switch?
A. flash:vlan.dat
B. nvram:vlans.xml
C. flash:vlans.txt
D. nvram:vlan.txt
E. flash.config.txt
F. flash:vlan.xml
A

A. flash:vlan.dat

25
Q

Which two commands or combination of commands make native VLAN 99 tagged? (Choose two)
A. vlan dot1q tag native
B. vlan dot1q tag native vlan 99
C. interface fa0/1
switchport trunk native vlan 99
D. encapsulation dot1q tag native vlan 99
E. encapsulation dot1q 99 native

A

A. vlan dot1q tag native
C. interface fa0/1
switchport trunk native vlan 99

26
Q

What does the interface subcommand “switchport voice vlan 222” indicate?
A. The port is configured for data and voice traffic.
B. The port is fully dedicated to forwarding voice traffic.
C. The port operates as an FXS telephony port.
D. Voice traffic is directed to VLAN 222.

A

A. The port is configured for data and voice traffic.
or
D. Voice traffic is directed to VLAN 222.
(Again, if this is correct - do NOT feel bad)

27
Q

What would happen if we delete VLAN that exist on switchport?
A. Port down and use native VLAN.
B. Port down and use default VLAN.
C. Port up and use native VLAN.
D. Port up and use default VLAN.
E. Port will remain shutdown/inactive until it is assigned a new VLAN.

A

E. Port will remain shutdown/inactive until it is assigned a new VLAN

28
Q

How to tag a native VLAN?
A. Use the ―vlan dot1q native tag‖ under interface configuration mode
B. Use the ―vlan dot1q native tag‖ under global configuration mode
C. Use the ―vlan dot1q tag native‖ under global configuration mode
D. Use the ―vlan dot1q tag native‖ under interface configuration mode

A

C. Use the ―vlan dot1q tag native‖ under global configuration mode
(Check this on your switch)

29
Q 
What are the control protocols make use of the native VLAN 1 by default? (Choose two)
A. STP
B. NTP
C. LACP
D. VTP
E. CDP
F. UDLD
A

D. VTP

E. CDP

30
Q

How 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.

A

C. Explicitly identify each VLAN allowed across the trunk

31
Q 
Which three VLANs are part of the extended range of available VLANs? (Choose three)
A. 1006 
B. 4095 
C. 4195 
D. 3000 
E. 4094 
F. 1001
A

A. 1006
D. 3000
E. 4094

32
Q 
Which 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
A

C. show interface trunk

D. show running-config

33
Q 
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
A

B. switchport access vlan 20

C. vlan 20

34
Q 
How many VLANs can be assigned to a user access port configured for VoIP?
A. 1 
B. 2 
C. 3 
D. unlimited
A

B. 2

35
Q

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
E. You can add VLANs in VTP server mode.

A

C. Configurations are saved in the vlan.dat file.

E. You can add VLANs in VTP server mode.

36
Q

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.

A

A. The lowest extended VLAN number is 1006.
D. They are recognized only by VTP version 3.
F. They require the extended system ID to be enabled on the device.

37
Q

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.

A

B. All untagged traffic that arrives on the device is placed into the native VLAN.
D. They are propagated through VTP.

38
Q 
Which protocol is used to propagate voice VLANs to a Cisco phone?
A. DTMF 
B. SKINNY 
C. SIP 
D. LLDP 
E. Cisco Discovery Protocol
A

E. Cisco Discovery Protocol

39
Q 
Which two control protocols use the native VLAN 1 by default? (Choose two)
A. CDP 
B. VTP 
C. NTP 
D. LACP 
E. STP
A

A. CDP

B. VTP

NP (21 decks)

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