Which Azure service enables multi-region, high-availability web applications with low-latency global load balancing? Learn how Azure Front Door delivers advanced routing, failover, and security for resilient, high-performance cloud apps.
Table of Contents
Question
A company wants to deploy a multi-region, high-availability web application with low-latency global load balancing. Which service should they use?
A. Azure Load Balancer
B. Azure Traffic Manager
C. Azure Virtual WAN
D. Azure Front Door
E. Azure CDN
Answer
D. Azure Front Door
Explanation
Azure Front Door provides global HTTP/HTTPS load balancing, improving latency and high availability for web applications.
The best Azure service for deploying a multi-region, high-availability web application with low-latency global load balancing is Azure Front Door.
- Global HTTP/HTTPS Load Balancing: Azure Front Door operates at the application layer (Layer 7) and provides global HTTP/HTTPS load balancing, intelligently routing user requests to the fastest and healthiest application backend across multiple Azure regions.
- Low-Latency and High Availability: By leveraging Microsoft’s global edge network and Anycast protocol, Azure Front Door ensures that users are connected to the nearest point-of-presence (POP), reducing latency and accelerating content delivery.
- Automatic Failover: Front Door continuously monitors backend health and automatically fails over to a secondary region if the primary region becomes unavailable, maintaining high availability even during regional outages.
- Advanced Routing and Acceleration: Features include dynamic site acceleration, SSL offloading, URL-based routing, session affinity, and customizable health probes to optimize performance and reliability for modern web applications.
- Security Integration: Built-in Web Application Firewall (WAF) and DDoS protection at the edge help secure applications from common threats and attacks.
- Multi-Region Architecture: Deploying identical application instances in multiple Azure regions and configuring Azure Front Door to route and fail over traffic ensures both active-active and active-passive high-availability scenarios.
Comparison with Other Options:
- Azure Traffic Manager provides DNS-based routing but does not offer application-layer acceleration, SSL offload, or integrated security features like Front Door.
- Azure Load Balancer is region-specific and operates at the transport layer, not suitable for global, multi-region web app scenarios.
- Azure Front Door is specifically designed for global, scalable, and resilient web application delivery.
Azure Front Door provides global HTTP/HTTPS load balancing, low-latency routing, automatic regional failover, and integrated security for multi-region, high-availability web applications, making it the optimal solution for resilient cloud deployments.
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