SummitCo is choosing between Metered and Unlimited data plans for their ExpressRoute circuit. Their anticipated egress to Azure is 45 TB/month and ingress is 5 TB/month. Which billing plan should they choose and why?
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Correct answer: Select the Unlimited data plan because 45 TB/month egress will be significantly cheaper as a flat monthly fee compared with per‑GB charges in the Metered plan..
Why this is the answer
The Unlimited data plan is the correct choice because ExpressRoute charges for egress (outbound data from Azure). With 45 TB/month of egress, the per-GB charges of the Metered plan would quickly exceed the flat monthly fee of the Unlimited plan, making Unlimited significantly more cost-effective for high egress scenarios. The Metered plan charges for all outbound data, not just ingress, making that option incorrect. The statement that Unlimited only applies to inbound data is false; Unlimited covers both inbound and outbound data. Finally, ExpressRoute circuits do not always bill egress at the same flat rate; billing depends directly on the chosen data plan.
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