Two VNets in different Azure regions must communicate privately. Which statement about VNet peering is correct?
A.Peering is transitive — VNet A peered to B and B to C lets A reach C
Non-transitivity is THE most-tested peering fact.
B.Peering is non-transitive and requires non-overlapping address spaces; global VNet peering works across regions
Correct — non-transitive, non-overlapping, cross-region supported.
C.Peered VNets must be in the same subscription
Cross-subscription and cross-tenant peering are both supported.
D.Peering requires a VPN gateway on each VNet
Peering rides the Microsoft backbone — no gateways required.
Why this answer
Peering uses the Microsoft backbone (no gateway needed), works across regions (global peering) and subscriptions/tenants — but is NON-transitive: A↔B and B↔C does NOT give A↔C. Overlapping CIDRs cannot peer. Hub-spoke transitivity needs a hub NVA/gateway.
Correct answer: B · Last reviewed 2026-02-14
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