Best Azure Feature for Optimal Video Playback

C

The question states that users are located worldwide and will be downloading large video files. The video playback experience would be improved if they can download the video from servers in the same region as the users. We can achieve this by using a content deliver network.

A content delivery network (CDN) is a distributed network of servers that can efficiently deliver web content to users. CDNs store cached content on edge servers in point-of-presence (POP) locations that are close to end users, to minimize latency.

Azure Content Delivery Network (CDN) offers developers a global solution for rapidly delivering high-bandwidth content to users by caching their content at strategically placed physical nodes across the world. Azure CDN can also accelerate dynamic content, which cannot be cached, by leveraging various network optimizations using CDN POPs. For example, route optimization to bypass Border Gateway Protocol (BGP).

The benefits of using Azure CDN to deliver web site assets include:

-> Better performance and improved user experience for end users, especially when using applications in which multiple round-trips are required to load content.

-> Large scaling to better handle instantaneous high loads, such as the start of a product launch event.

-> Distribution of user requests and serving of content directly from edge servers so that less traffic is sent to the origin server.

https://docs.microsoft.com/en-us/azure/cdn/cdn-overview

The recommended Azure feature to provide the best video playback experience for a website that will host large video files and accessed by users worldwide is a content delivery network (CDN).

A CDN is a distributed network of servers located in different regions worldwide. The CDN copies the content from the website and distributes it across the servers. When a user requests a video, the CDN server closest to the user will deliver the content, which reduces latency and improves the video playback experience.

Using a CDN can improve website performance, reduce load times, and increase scalability. It can also reduce bandwidth costs, as the CDN caches the content and serves it from the nearest server, rather than sending it from the origin server for every request.

Option A, an application gateway, is a service that provides application-level routing and load balancing. It is used to manage traffic to web applications and is not specifically designed for video content delivery.

Option B, an Azure ExpressRoute circuit, is a dedicated private connection between an organization's on-premises infrastructure and Azure datacenters. It is used to improve network performance, security, and reliability but is not specific to video content delivery.

Option D, an Azure Traffic Manager profile, is a DNS-based traffic routing service that is used to distribute traffic across multiple endpoints. It is used to improve website availability and can be used with multiple endpoints, including Azure and non-Azure endpoints. However, it is not specifically designed for video content delivery.

Therefore, the correct answer is option C, a content delivery network (CDN), which is specifically designed to provide the best video playback experience for websites hosting large video files accessed by users worldwide.