Which Azure service improves web app performance and availability by caching content globally? Learn how Azure Content Delivery Network (CDN) uses edge servers to reduce latency and deliver content efficiently.
Table of Contents
Question
A company wants to host a highly available web application with low-latency access for users around the world. Which Azure service should they use to ensure optimal performance and global availability?
A. Azure Virtual Machines
B. Azure Blob Storage
C. Azure Content Delivery Network (CDN)
D. Azure App Service
E. Azure SQL Database
Answer
C. Azure Content Delivery Network (CDN)
Explanation
Azure CDN caches content at strategically placed edge locations worldwide, improving the performance and availability of web applications for global users.
The Azure service that ensures high availability and low-latency access for users worldwide by distributing traffic and caching content globally is Azure Content Delivery Network (CDN).
Azure CDN is a distributed network of strategically placed edge servers (Points of Presence, or POPs) around the world that cache static and dynamic web content close to users. This reduces the physical distance data must travel, significantly lowering latency and improving load times.
- When a user requests content, Azure CDN directs the request to the nearest edge server. If the content is cached there, it is delivered immediately; if not, the CDN fetches it from the origin server, caches it, and then serves it to the user.
- Azure CDN supports various content types, including images, videos, scripts, stylesheets, and downloadable files, making it ideal for web applications serving global audiences.
- It provides scalability by handling sudden traffic spikes efficiently without overloading the origin server, ensuring consistent performance and availability.
- Azure CDN includes advanced features such as HTTP/2 and HTTP/3 support, dynamic site acceleration, customizable cache rules, and integration with Azure services like Blob Storage and App Service.
- The service also enhances security by supporting HTTPS, DDoS protection, and integration with Azure Web Application Firewall (WAF).
Benefits:
- Improved User Experience: Faster page load times and reduced buffering for media content.
- Global Reach: Content is delivered quickly to users regardless of their geographic location.
- Reduced Origin Load: Offloads traffic from the origin server, improving its performance and reliability.
- Easy Setup and Management: Azure CDN is simple to configure and integrates seamlessly with existing Azure resources.
Azure CDN caches content at edge locations worldwide, reducing latency and improving the availability and performance of web applications for global users by serving content from the nearest server to the user.
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