Question

Difficulty: HardAzure Virtual Networks, ExpressRoute, and VPN Gateway

A company is implementing a hybrid networking architecture to connect its on-premises office to resources inside an Azure virtual network. The design requires a primary high-bandwidth private connection and a secondary, encrypted backup connection that runs over the public internet.

Which two statements correctly describe the connectivity options that should be used for this design? (Select two)

  1. ExpressRoute routes traffic over a dedicated, private connection rather than the public internet.Answer
  2. A Site-to-Site VPN Gateway connection encrypts traffic and transmits it over the public internet.Answer
  3. C
    ExpressRoute provides encrypted tunnels that transmit data directly over the public internet.
  4. D
    A VPN Gateway connection is restricted to public cloud environments and cannot be used in hybrid configurations.

Answer

ExpressRoute routes traffic over a dedicated, private connection rather than the public internet, and a Site-to-Site VPN Gateway connection encrypts traffic and transmits it over the public internet.
The correct options are the ones stating that ExpressRoute routes traffic over a dedicated private connection and that a Site-to-Site VPN Gateway encrypts traffic and transmits it over the public internet. ExpressRoute connects local datacenters directly to Azure resources via a private network partner, avoiding the public internet for increased security, speed, and reliability. In contrast, a Site-to-Site VPN Gateway establishes an encrypted tunnel over the public internet, making it an excellent cost-effective backup option.

Step-by-Step Solution

1
Analyze the requirements for the primary connection.
The primary connection needs high-bandwidth and must bypass the public internet. ExpressRoute meets this by using a private, dedicated connection.
ExpressRoute connections do not go over the public internet, offering reliability and high speed.
2
Analyze the requirements for the secondary/backup connection.
The backup connection must be encrypted and run over the public internet. A Site-to-Site VPN Gateway meets this requirement.
VPN Gateways establish encrypted tunnels (IPsec/IKE) over the public internet, providing a lower-cost secure alternative.

Key Concept

Azure hybrid networking services including ExpressRoute and VPN Gateways.
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