Home > VLAN Questions 3

VLAN Questions 3

November 24th, 2019 in SWITCH 300-115 Go to comments

Question 1

Question 2

Question 3

Question 4a

In which place does all VLANs get stored?

(In which place all VLAN are 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

 

Answer: F

Question 4b

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

 

Answer: A

Question 5

Question 6

Question 7

Explanation

Let’s see an example of configuring this command.

Cisco_IP_Phone_data_voice_VLANs.jpg

Switch(config)#interface fa0/0
Switch(config-if)#switchport voice vlan 30

The “switchport voice vlan 30” command directs the switch to send CDP packets that configure the IP phone to transmit voice traffic in 802.1Q frames, tagged with VLAN 30. The data traffic is sent to the native VLAN (untagged).

Therefore in this question both answer A and D are correct. I don’t know why we only have one choice in this question.

(Reference and a good resource: http://www.cisco.com/en/US/products/hw/switches/ps4324/products_configuration_example09186a0080722cdb.shtml)

Question 8

Question 9

Question 10

Comments
  1. cisco
    March 28th, 2019

    I believe answer five is wrong. Answer should be C. Assuming that it is a Cisco Switch running PVST+
    https://community.cisco.com/t5/switching/how-bpdu-is-transmitted-with-native-vlan-for-pvst-and-mstp/td-p/1631995

  2. cisco
    March 28th, 2019

    [EDIT]
    I believe answer five is wrong. Answer should be C. Assuming that it is a Cisco Switch running PVST+
    https://community.cisco.com/t5/switching/how-bpdu-is-transmitted-with-native-vlan-for-pvst-and-mstp/td-p/1631995

  3. cisco
    March 28th, 2019

    [EDIT]
    I believe answer 6 is wrong. Answer should be C. Assuming that it is a Cisco Switch running PVST+
    https://community.cisco.com/t5/switching/how-bpdu-is-transmitted-with-native-vlan-for-pvst-and-mstp/td-p/1631995

  4. jnjuki
    August 28th, 2019

    I agree with @cisco

  5. jnjuki
    August 28th, 2019

    Actually, I don’t.
    STP would indicate standard STP BPDU so definitely untagged and with the native (untagged vlan) now 539, it would be on that VLAN.

  6. kapustovy_prd
    September 12th, 2019

    Q8 – none of the answers is correct. Lab it.
    Switchport will remain in up up status and it will be still assigned to vlan which is deleted.

  7. Burìk
    October 27th, 2019

    Q8 – The only proper answer is E.

    Most likely the answers here are just poorly worded, the proper word here being “inactive”. The port does not go in shutdown state after you remove the VLAN it belongs to, it just goes into an inactive state:

    Switch#show interfaces fastEthernet 0/1 switchport
    [..]
    Access Mode VLAN: 10 (Inactive)
    [..]

    Switch#show vlan

    VLAN Name Status Ports
    —- ——————————– ——— ——————————-
    1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5
    Fa0/6, Fa0/7, Fa0/8, Fa0/9
    Fa0/10, Fa0/11, Fa0/12, Fa0/13
    Fa0/14, Fa0/15, Fa0/16, Fa0/17
    Fa0/18, Fa0/19, Fa0/20, Fa0/21
    Fa0/22, Fa0/23, Fa0/24, Gi0/1
    Gi0/2

    ^ neither the deleted VLAN nor the Fa0/1 port is shown in the “show vlan” output. This is because once you delete a VLAN, all ports that belong to that VLAN go in no man’s land. But they do NOT go in shutdown state.

  8. Honkytonk
    November 23rd, 2019

    Please check Q3 A and B is also correct.

  9. John
    December 8th, 2019

    Question 5
    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

    what is correct answer guys ? A and C ?

  10. Epyon
    December 9th, 2019

    Question 1.

    No correct answer as Extended VLAN’s range is 1006-4094 not 4096

  11. sclebo05
    December 28th, 2019

    Agree with epyon on Question #1 – it’s a small thing, but vlans up to 4094 are supported.

  12. bierrrr
    January 11th, 2020

    Q1. The extended range is quite confusing as Cisco seems to contradict themselves. According to this page extended range is 1006-4096:

    Extended range VLANs (VLANs 1006 to 4096)
    https://www.cisco.com/c/en/us/td/docs/switches/lan/embedded/software/release/15_0_2_ec/configuration/guide/ess_2020_scg/swvlan.html

  13. John2020
    January 26th, 2020

    Guys what is correct answer for Q:5 ?

    PLease help

  14. flkang
    January 28th, 2020

    For Q5, C and A
    C
    (config)# interface fa0/1
    (config-if)# switchport trunk native vlan 99w

    A
    (config)# vlan dot1q tag native
    *** THIS COMMAND WILL AFFECT ALL NATIVE VLANS ON ALL TRUNKS**

  15. ONEWAY
    January 30th, 2020

    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.

    This is E for sure. Just tried it on a real switch.

    Switch-1#show interfaces gigabitEthernet 0/1 swi
    Switch-1#show interfaces gigabitEthernet 0/1 switchport
    Name: Gi0/1
    Switchport: Enabled
    Administrative Mode: static access
    Operational Mode: down
    Administrative Trunking Encapsulation: dot1q
    Negotiation of Trunking: Off
    Access Mode VLAN: 100 (Inactive)
    Trunking Native Mode VLAN: 1 (default)

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