Hard1 markMultiple Choice
Domain 4.4: Network SolutionsDomain 4.4ExpressRouteHybrid Networking

AZ-305 · Question 51 · Domain 4.4: Network Solutions

CASE STUDY: Contoso Ltd is a global financial services firm with 10,000 employees. They have a primary on-premises data center in London and a secondary in New York. They are migrating to Azure and require a hub-and-spoke network topology. Requirements: 1) Secure connectivity between on-premises and Azure with at least 5 Gbps throughput and redundancy. 2) Centralized inspection of all outbound internet traffic from spoke VNets. 3) Spoke VNets must communicate with each other securely. 4) PaaS services (Storage, SQL) must be accessed privately without traversing the public internet. 5) Web applications in spokes require WAF protection and global load balancing.

Question 1 of 5: To meet Requirement 1 (Secure connectivity with at least 5 Gbps throughput and redundancy), which hybrid connectivity solution should you recommend?

Answer options:

A.

Site-to-Site VPN Gateway (VpnGw1).

B.

ExpressRoute with a VPN Gateway as a failover.

C.

Azure Point-to-Site VPN.

D.

Azure Peering Service.

How to approach this question

Identify the hybrid connection that supports high throughput (>1.25 Gbps) and how to make it redundant.

Full Answer

B.ExpressRoute with a VPN Gateway as a failover.✓ Correct
Azure ExpressRoute provides private, high-throughput connectivity (up to 100 Gbps). To meet the redundancy requirement, a Site-to-Site VPN can be configured as a backup path if the ExpressRoute circuit fails.

Common mistakes

Selecting a standard VPN Gateway, which cannot meet the 5 Gbps throughput requirement.

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