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Cisco 400-007 Exam
Cisco Certified Design Expert CCDE v3.0 (Page 3 )

Updated On: 15-Feb-2026
Page 3 of 60
PDF with 397 Questions

Refer to the exhibit.


ACME Mining has four data centers in Santiago, Cape Town, Mumbai, and Beijing, full-mesh connected via a 400 Mb/s EVP-LAN. They want to deploy a new mission-critical application with these requirements:

* cluster heartbeat 2 MB/s continuous (250 KB/s)
* cluster heartbeat one-way maximum latency 100 ms

These are the current ping tests results between the four data centers:



Which hosting data center pair can host the new application?

  1. Mumbai and Beijing
  2. Cape Town and Mumbai
  3. Cape Town and Beijing
  4. Santiago and Mumbai
  5. Santiago and Beijing
  6. Santiago and Cape Town

Answer(s): B



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?

  1. DWDM over dark fiber
  2. Metro Ethernet
  3. MPLS wires only
  4. CWDM over dark fiber

Answer(s): D

Explanation:

-DWDM over dark fiber is the most expensive option because it requires the purchase of dedicated dark fiber.
-Metro Ethernet is a more cost-effective option, but it may not be available in all locations.
-MPLS wires only is the least expensive option, but it does not offer the same level of performance as the other options.
-CWDM over dark fiber is a good compromise between cost and performance. It is less expensive than DWDM over dark fiber, but it still offers a high level of performance.
-



Refer to the table.



A customer investigates connectivity options for a DCI between two production data centers. The solution must provide dual 10G connections between locations with no single points of failure for Day 1 operations. It must also include an option to scale for up to 20 resilient connections in the second year to accommodate isolated SAN over IP and isolated dedicated replication IP circuits. All connectivity methods are duplex 10 Gbps. Which transport technology costs the least over two years in this scenario?

  1. CWDM
  2. DWDM
  3. MPLS
  4. Metro Ethernet

Answer(s): B

Explanation:

The hint is the requirement 'option to scale for up to 20 resilient connections in the second year'. this effectively multiplies the estimated cost with 20 times.

DWDM will leverage multiple lambdas across 2 x fibres to provide that scale without additional cost for each connection added. effectively scaling out is amortised into the original contract


Reference:

https://www.commscope.com/blog/2019/cwdm-vs.-dwdm-decoding-the-differences-between-wave-division-multiplexing-options/



What are two examples of business goals to be considered when a network design is built? (Choose two.)

  1. integrate endpoint posture
  2. ensure faster obsolescence
  3. minimize operational costs
  4. reduce complexity
  5. standardize resiliency

Answer(s): C,D

Explanation:

-Minimizing operational costs is important because it ensures that the network is affordable to operate and maintain. This can be achieved by using cost-effective hardware and software, and by designing the network in a way that minimizes the need for manual intervention.
-Reducing complexity is important because it makes the network easier to manage and troubleshoot. This can be achieved by using a standardized network architecture, and by using tools that automate network management tasks.

The other options are not as important as minimizing operational costs and reducing complexity.

-Integrating endpoint posture is important for security, but it is not as critical as minimizing operational costs and reducing complexity.
-Ensuring faster obsolescence is not a business goal. It is a technical goal that is typically achieved by using hardware and software that is based on open standards.
-Standardizing resiliency is important for reliability, but it is not as critical as minimizing operational costs and reducing complexity.
-



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 migration is estimated to take 20 months to complete but might extend an additional 10 months if issues arise. All connectivity options meet the requirements to migrate workloads. Which transport technology provides the best ROI based on cost and flexibility?

  1. DWDM over dark fiber
  2. MPLS
  3. CWDM over dark fiber
  4. Metro Ethernet

Answer(s): C

Explanation:

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 (C).






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