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Exam 400-007 topic 1 question 7 discussion

Actual exam question from Cisco's 400-007

Question #: 7
Topic #: 1

Refer to the table. A customer investigates connectivity options for a DCI between two production data centers to aid a large-scale migration project. The solution must provide a single 10G connection between locations and be able to run its own varying QoS profiles without service provider interaction based on the migration stages. All connectivity methods are at 10 Gbps. Which transport technology costs the least if the connectivity is required for just one year?

A. DWDM over dark fiber
B. Metro Ethernet
C. MPLS wires only
D. CWDM over dark fiber

Show Suggested Answer

Suggested Answer: D 🗳️

by qtg9rMGmj23tFm4n02X4 at Nov. 6, 2022, 11:34 a.m.

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qtg9rMGmj23tFm4n02X4

Highly Voted 2 years, 1 month ago

Selected Answer: D

Note the requirement, "be able to run its own varying QoS profiles without service provider interaction based on the migration stages". Totals for each solution. dwdm 380000 cwdm 325000 mpls 215000 metro-e 350000 At first glance MPLS is best, however QOS will need SP integration. Thus CWDM (D).

upvoted 6 times

ying162

2 years ago

it is MPLS wires only so there is no SP interaction for QoS. Answer is correct

upvoted 5 times

biddid

1 year, 8 months ago

It needs SP action. https://community.cisco.com/t5/mpls/qos-in-vpls/td-p/1731781

upvoted 1 times

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ying162

1 year, 9 months ago

cwdm is 475k

upvoted 1 times

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fosi130

Most Recent 10 months, 1 week ago

Selected Answer: D

correct response

upvoted 1 times

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Rim007

1 year, 2 months ago

Selected Answer: D

CWDM , thats my choice

upvoted 1 times

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mostafabebers

1 year, 7 months ago

Answer C is right, QoS pipe mode

upvoted 1 times

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pizdecvsemu

1 year, 9 months ago

Selected Answer: D

I'd do D. MPLS providers offer different QoS profiles (couple of classes) and in order to change it you need to interact with SP. MPLS wires only is not fully managed MPLS service, but you still need to select/change QoS profile according to SP's offers.

upvoted 2 times

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pestman

1 year, 9 months ago

I think the answer is CWDM, With MPLS Wires, if the provider runs into congestion packets will be dropped regardless of QoS tags. The provider would need to configure a policy for priority queuing. Typically providers charge a premium for this service.

upvoted 2 times

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