At which OSI layer does ExpressRoute operate?

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

How the community answered

(39 responses)

A
3% (1)
B
95% (37)
D
3% (1)

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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