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Exam H12-211 topic 1 question 139 discussion

Actual exam question from Huawei's H12-211
Question #: 139
Topic #: 1
[All H12-211 Questions]

The network administrator wishes to forward data over an Eth-trunk, however associated member interfaces operate at different rates. In terms of the resulting behavior, which of the following is true?

  • A. The two switches will not be able to communicate.
  • B. The higher rate member interfaces may incur packet loss.
  • C. The Eth-Trunk will work normally.
  • D. The lower rate member interfaces may incur packet loss.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️

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nishan
3 years, 1 month ago
answer should be A due to speed mismatch lag wont form.
upvoted 1 times
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Goathammer
3 years, 2 months ago
Yeah a bit confusing, R&S v2.5 intermediate book states that "when member interfaces have different rates, the interface with lower rates may become congested and packet loss may occur." But all public support pages say that you can't bundle interfaces with different rates. Maybe this means that you can bundle 2x Gigabit Ethernets to Eth-trunk and squeeze one of them to speed 100 and this causes the congestion. If this is the case, then D is correct. Especially when interfaces have already associated to eth-trunk.
upvoted 1 times
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darthvader
3 years, 5 months ago
A correct answer is A. https://support.huawei.com/enterprise/en/doc/EDOC1100090434 Quote: "In versions earlier than V200R011C10, only interfaces with the same rate can join an Eth-Trunk. For example, GE electrical interfaces and GE optical interfaces can be added to the same Eth-Trunk. In V200R011C10 and later versions, after the mixed-rate link enable command is run, interfaces with different rates can be added to the same Eth-Trunk."
upvoted 3 times
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