Cisco Exam 400-007 Topic 5 Question 57 Discussion

Actual exam question for Cisco's 400-007 exam

Question #: 57
Topic #: 5

[All 400-007 Questions]

Which two descriptions of CWDM are true? (Choose two)

Atypically used over long distances, but requires optical amplification

Buses the 850nm band

Callows up to 32 optical earners to be multiplexed onto a single fiber

Dshares the same transmission window as DWDM

EPassive CWDM devices require no electrical power

Show Suggested Answer

Suggested Answer: D, E

by Carman at Jan 22, 2025, 11:35 PM

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Cordelia

4 months ago

I'm going with C and E, no doubt. 32 carriers and no power required? Sign me up for that CWDM goodness!

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Rolande

3 months ago

User 2: Definitely, having 32 carriers on one fiber without needing power is a game changer.

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Fernanda

3 months ago

User 1: I agree, C and E sound like the best options for CWDM.

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Mary

4 months ago

Haha, A and B are just trolling us. CWDM is all about that 1550nm band, not the 850nm stuff. And long distances? Nah, that's what DWDM is for.

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Taryn

3 months ago

User 2: Totally agree, and it's not for long distances either. That's DWDM territory.

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Amos

4 months ago

User 1: Yeah, A and B are definitely misleading. CWDM is all about the 1550nm band.

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Lanie

4 months ago

Hmm, I think C and D are the right choices. CWDM may share the same transmission window as DWDM, but it definitely allows 32 carriers. Who needs optical amplification anyway?

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Carin

3 months ago

Definitely, C and D are the right choices. CWDM is efficient in allowing multiple carriers without the need for optical amplification.

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Lucille

3 months ago

I think you're right. CWDM shares the same transmission window as DWDM, but it does allow for multiple carriers.

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Beatriz

3 months ago

Yeah, optical amplification is not needed for CWDM. It's great that passive CWDM devices require no electrical power.

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Dominga

3 months ago

I agree, C and D are the correct choices. CWDM can definitely multiplex up to 32 carriers.

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Malcolm

4 months ago

C and E are the correct answers. CWDM allows up to 32 optical carriers on a single fiber, and passive CWDM devices don't need electrical power. The other options are incorrect.

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