The question is trying to trick us. Answer A is correct because Cisco switches always have VLAN 1 as the default VLAN, which is needed for many protocol communication between switches like spanning-tree protocol for instance.
You can't change or even delete the default VLAN, it is mandatory.
The native VLAN is the only VLAN which is not tagged in a trunk, in other words, native VLAN frames are transmitted unchanged.
https://community.cisco.com/t5/switching/what-is-difference-between-default-vlan-and-native-vlan/td-p/2095204
ZayaB is right, this question was made to confuse, remember the default vlan in a switch cisco is the vlan number 1, the image that you see in this question is only to make doubt.
If we see with careful, the question is given the answer, when we see the word default. That's mean that is default vlan. So
The answer is "A"
Why does every question either try to trick you or rely on some super edge use case? And they wonder why people use dumps? These questions are horrible and aren't in the spirit of knowing the material.
Yeah it's ridiculous. Dumps are fine as long as you actually learn the material and understand where you have knowledge gaps. The real world isn't so harsh; you can always look something up in about 10 seconds with Google or ChatGPT. There's zero need to remember obscure edge-case technicalities.
A. VLAN 1
As soon as the switches are powered on, the default VLAN is VLAN 1. Then, you execute the commands on SW1:
interface …
switchport mode …
switchport access …
interface …
switchport mode …
switchport trunk …
switchport trunk native vlan 10
Same happens on SW2:
interface …
switchport mode …
switchport access …
interface …
switchport mode …
switchport trunk …
switchport trunk native vlan 10
Now, the NATIVE VLAN on both sides of the trunk is VLAN 10. But the DEFAULT VLAN on both switches in still VLAN 1.
Correct Answer
B. VLAN 5
Wrong answer.
C. VLAN 10
Wrong answer.
D. VLAN 20
Wrong answer.
Not sure if this is trying to trick us into maybe thinking that the answer is vlan 1 actually. The wording of the question asking "which VLAN ID is associated to the default VLAN (1) as we know all cisco switches have vlan 1 as default. But question states "Refer to the exhibit.." so why even throw that in their with a bunch of commands if not to just ask what a default vlan of a cisco switch is ?? Poor question if you ask me all around.
Cisco switches have a factory configuration in which default VLANs are preconfigured to support various media and protocol types. The default Ethernet VLAN is VLAN 1. It is a security best practice to configure all the ports on all switches to be associated with VLANs other than VLAN 1
I hate these gotcha questions. It’s so stupid to even make it a question if the default vlan is always 1. Why even ask in this way? Just ask what the default vlan is
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A (35%)
C (25%)
B (20%)
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