Refer to the exhibit.
You have been hired to assist with a migration to an ITaaS environment. The company has offices
in Atlanta, Dubai, and London, with 5000, 2000, and 3000 employees, respectively. A data center
exists in each location, and most services have been virtualized. Messaging services are provided
locally to the user.
You have just performed an assessment of the environment. The results are shown in the exhibit.
The CIO is interested in closing one of the data centers and migrating some or all of the services
to a public cloud service provider (CSP). Any services that do not get migrated to the CSP will be
hosted at one of the other two data centers. Network latency averages 8 milliseconds between
the Atlanta and London offices, and 10 milliseconds between the London and Dubai offices. Traffic
between Atlanta and Dubai is routed through London.
The eCommerce application is external facing and is hosted at all three data centers. Atlanta
services 50% of the users in North and South America. London services 40% of the users in
Europe and Asia. Dubai services 10% of the users in Africa and Australia.
You have tentatively chosen a CSP that is housed in Frankfurt, and would have access to 3 Gb/s
of network bandwidth to the facility. The CSP’s service levels are as follows:
RPO: 4 hours
RTO: 1 hour
Availability: 99.995%
Your recommendation is to close the Dubai data center over a one-year time horizon.
What migration strategy would you recommend for the services that are currently hosted in the
Dubai data center, and why?
A.
Messaging to the public cloud; split eCommerce between London and Atlanta; CSP cannot
support the availability for eCommerce
B.
eCommerce to the public cloud; Messaging to London; CSP cannot support the bandwidth
requirements for Messaging, and latency will be less from London
C.
Messaging and eCommerce to the public cloud; CSP can support availability and bandwidth
requirements for both applications
D.
eCommerce to the public cloud; Messaging to Atlanta; CSP cannot support the bandwidth
requirements for Messaging, and latency will be less from Atlanta