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Exam 200-301 topic 1 question 1056 discussion

Actual exam question from Cisco's 200-301
Question #: 1056
Topic #: 1
[All 200-301 Questions]



Refer to the exhibit SW_1 and SW_12 represent two companies that are merging. They use separate network vendors. The VLANs on both sides have been migrated to share IP subnets. Which command sequence must be issued on both sides to join the two companies and pass all VLANs between the companies?

  • A. switchport mode trunk
    switchport trunk encapsulation dot1q
  • B. switchport mode trunk
    switchport trunk allowed vlan all
    switchport dot1q ethertype 0800
  • C. switchport mode dynamic desirable
    switchport trunk allowed vlan all
    switchport trunk native vlan 7
  • D. switchport dynamic auto
    switchport nonegotiate
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by rAlexandre at Feb. 15, 2023, 7:06 p.m.

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rAlexandre
Highly Voted 1 year, 11 months ago
Selected Answer: A
I think the purpose is to change the encapsulation to dot1q because isl is a Cisco proprietary protocol
upvoted 20 times
AbdullahMohammad251
1 year ago
The question says the two companies use separate vendors, this means one of them uses third-party switches while the other may or may not use Cisco switches. We need an open-standard trunking protocol, do1q is open-standard. ISL is Cisco proprietary and can't be used.
upvoted 5 times
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oatmealturkey
1 year, 11 months ago
Correct and dynamic desirable mode is only for DTP which is also Cisco proprietary
upvoted 6 times
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Rynurr
Highly Voted 1 year, 11 months ago
Selected Answer: A
Need to set trunk and encapsulation dot1q, so "A" is the correct answer.
upvoted 8 times
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ZeroK
Most Recent 10 months, 1 week ago
Selected Answer: B
This configuration sets the interface to trunk mode (switchport mode trunk), allows all VLANs to pass through the trunk (switchport trunk allowed vlan all), and specifies the trunk encapsulation method as IEEE 802.1Q (switchport trunk encapsulation dot1q). Option A is incorrect because it does not explicitly allow all VLANs to pass through the trunk. Option C is incorrect because it sets the interface to dynamic desirable mode, which would try to negotiate trunking with the neighboring switch. Additionally, setting the native VLAN to VLAN 7 might not be appropriate if VLANs are being merged between the two companies. Option D is incorrect because it sets the interface to dynamic auto mode, which means it would passively wait for the neighboring switch to initiate trunking negotiation. Additionally, the switchport nonegotiate command is not necessary in this context.
upvoted 1 times
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Cynthia2023
1 year, 5 months ago
Selected Answer: A
The command "switchport dot1q ethertype 0800" is not required in this context and doesn't play a role in joining VLANs between two switches. The "switchport dot1q ethertype" command is used to specify a particular EtherType to be used for tagging VLANs. The default EtherType for 802.1Q tagging is 0x8100, which is used to indicate that the frame carries VLAN information. The value 0800 corresponds to the EtherType for IPv4.
upvoted 2 times
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bisiyemo1
1 year, 10 months ago
Selected Answer: A
A is sure
upvoted 5 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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