Tag Archives: Anycast

26 Jan 2026

How TLD DNS latency shapes CDN TTFB and Core Web Vitals

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The DNS performance of top level domains is a hidden but decisive factor in global content delivery. Before any CDN edge or web server can respond, resolvers must traverse the DNS hierarchy and contact TLD nameservers. In this article we examine how modern TLD infrastructure, latency profiles and security features affect Time to First Byte and how to choose TLDs that support, not limit, your web performance strategy. Top level domain latency as a performance lever The DNS lookup path to [...]

16 Nov 2025

CDN Traffic Steering Guide DNS Anycast Layer 7 Multi CDN P2P

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Choosing the right CDN architecture is no longer just about “having a CDN.” Today, providers use very different traffic steering technologies to decide which edge server (or even which peer) will serve each request. In this article we walk through the main models—DNS-based, Anycast, application-layer steering, multi-CDN, and P2P CDNs—explaining how they work, how they differ, and where each shines. Modern CDNs are primarily differentiated not only by their footprint or capacity, but by how they decide which edge node [...]

01 Oct 2018

Understanding CDN DNS Routing – Unicast Versus Anycast

- CDN
Chris

CDN DNS routing is what makes the performance optimization offered by Content Delivery Networks possible. It gives CDNs the ability to dynamically route traffic to their nodes across the world enabling them to improve the user experience of website visitors with faster site load times. DNS Unicast or Anycast are two possible routing solutions which CDNs utilize to accomplish this. However, what is the difference between the two and which one provides the better solution? Sites using CDNs configured with [...]