A network engineer at a logistics company is reviewing the data-transfer section of the Azure invoice. Some inbound transfers show no charge, while outbound transfers are grouped by what the invoice calls billing zones. The engineer has worked with availability zones and assumes the two terms refer to the same thing. Which explanation is accurate?

1. A. Inbound and outbound transfers are both billed at one flat per-gigabyte rate that depends only on the size of the source virtual machine 💬 A
2. B. Some inbound transfers into Azure datacenters are free, while outbound transfers are priced by billing zones — geographic groupings of regions for data-transfer pricing, distinct from availability zones ✓ B
3. C. Transfers are free while they stay inside a single availability zone, and charges apply only when traffic leaves that availability zone 💬 C
4. D. Outbound transfers between Azure regions are free of charge, and data-transfer billing applies only to traffic that leaves Azure entirely to the public internet 💬 D

Reveal answer

Correct answer: Some inbound transfers into Azure datacenters are free, while outbound transfers are priced by billing zones — geographic groupings of regions for data-transfer pricing, distinct from availability zones

Reference: https://learn.microsoft.com/en-us/training/modules/describe-cost-management-azure/2-describe-factors-affect-costs-azure