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AZ-900 · Question #475

AZ-900 Question #475: Real Exam Question with Answer & Explanation

The correct answer is B: Layer 3. Layer 3 connectivity between your on-premises network and the Microsoft Cloud through a connectivity provider. Connectivity can be from an any-to-any (IPVPN) network, a point-to-point Ethernet connection, or through a virtual cross-connection via an Ethernet exchange. https://lea

Submitted by fernanda_arg· Mar 5, 2026Describe Azure Architecture and Services

Question

At which OSI layer does ExpressRoute operate?

Options

  • ALayer 2
  • BLayer 3
  • CLayer 5
  • DLayer 7

Explanation

Layer 3 connectivity between your on-premises network and the Microsoft Cloud through a connectivity provider. Connectivity can be from an any-to-any (IPVPN) network, a point-to-point Ethernet connection, or through a virtual cross-connection via an Ethernet exchange. https://learn.microsoft.com/en-us/azure/expressroute/expressroute-introduction#key-benefits

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