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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?
A. Metro Ethernet
B. MPLS
C. DWDM over dark fiber
D. CWDM over dark fiber
Answer: A
Explanation:
Let's calculate the total cost for each solution based on the most likely maximum duration (20 + 10 = 30 months) to ensure conservative, flexible planning.
-
* DWDM over dark fiber:
* CAPEX = $200,000
* OPEX (annual): $100,000#for 30 months = (2.5 ¡Á $100,000) = $250,000
* Installation fee = $30,000
* Total = $200,000 + $250,000 + $30,000 = $480,000
* CWDM over dark fiber:
* CAPEX = $150,000
* OPEX (annual): $100,000#for 30 months = (2.5 ¡Á $100,000) = $250,000
* Installation fee = $25,000
* Total = $150,000 + $250,000 + $25,000 = $425,000
* MPLS wires only:
* CAPEX = $50,000
* OPEX (annual): $180,000#for 30 months = (2.5 ¡Á $180,000) = $450,000
* Installation fee = $5,000
* Total = $50,000 + $450,000 + $5,000 = $505,000
* Metro Ethernet:
* CAPEX = $65,000
* OPEX (annual): $100,000#for 30 months = (2.5 ¡Á $100,000) = $250,000
* Installation fee = $5,000
* Total = $65,000 + $250,000 + $5,000 = $320,000
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Analysis:
* Metro Ethernet has the lowest overall cost at $320,000 and provides sufficient flexibility for workload migration since "all connectivity options meet technical requirements."
* Metro Ethernet is typically more flexible than DWDM/CWDM for temporary or dynamic migration projects because it does not require optical expertise or complex dark fiber management.
* MPLS is more expensive here and less flexible for large-scale Layer 2 migrations.
* CWDM/DWDM are suitable for permanent solutions where long-term investment is justified, but not optimal here due to cost.
Therefore, best ROI and flexibility: Metro Ethernet
Final correct answer: D
NEW QUESTION # 399
Company XYZ was not satisfied with the reconvergence time OSPF is taking. BFD was implemented to try to reduce the reconvergence time, but the network is still experiencing delays when having to reconverge. Which technology will improve the design?
A. Change the protocol to BGP
B. OSPF fast hellos
C. BFD echo
D. Change the OSPF hello and dead intervals
Answer: C
Explanation:
* B (BFD Echo):BFD Echo mode uses local hardware-based loopback mechanisms for even faster fault detection than regular BFD asynchronous mode, significantly reducing failure detection time and thus convergence delay.
Other options explained:
* A/D: OSPF fast hellos improve OSPF detection but are still control-plane driven and slower than hardware-based BFD Echo.
* C: BGP is slower to converge than OSPF, especially for IGP-like designs.
NEW QUESTION # 400
A network security team observes phishing attacks on a user machine from a remote location. The organization has a policy of saving confidential data on two different systems using different types of authentication. What is the next step to control such events after the security team verifies all users in Zero Trust modeling?
A. Apply a context-based network access control policy for users.
B. Enforce risk-based and adaptive access policies.
C. Assess real-time security health of devices.
D. Ensure trustworthiness of devices.
Answer: B
Explanation:
* A (Risk-based and adaptive access policies): After verifying user identity within a Zero Trust architecture, the next logical step is to apply continuous, adaptive risk-based policies that evaluate contextual factors (device posture, behavior, location, etc.) before granting access. This approach dynamically responds to threats such as phishing attacks by adjusting access permissions based on real- time risk.
Other options explained:
* B/C/D: These are supporting mechanisms, but risk-based policies directly address dynamic attack mitigation.
NEW QUESTION # 401
A product manufacturing organization is integrating cloud services into their IT solution. The IT team is working on the preparation phase of the implementation approach, which includes the Define Strategy step. This step defines the scope of IT, the application, and the service. What is one topic that should be considered in the Define Strategy step?
A. due diligence and financial scenarios
B. innovate and align with business according to volume
NEW QUESTION # 402
Drag and drop the design characteristics from the left onto the correct network filter techniques on the right. Not all options are used. Answer:
Explanation:
NEW QUESTION # 403
......
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