---
title: CDN Basics
---

[![BlazingCDN](https://blog.blazingcdn.com/hubfs/Logo/blog-logo-w.png)](https://blog.blazingcdn.com?hsLang=en)

[📘Learn ▾](https://blog.blazingcdn.com/cdn-learn?hsLang=en)

[CDN Fundamentals](https://blog.blazingcdn.com/cdn-fundamentals?hsLang=en) [By Content Type](https://blog.blazingcdn.com/by-content-type?hsLang=en) [Advanced Concepts](https://blog.blazingcdn.com/advanced-concepts?hsLang=en) [Glossary](https://blog.blazingcdn.com/glossary?hsLang=en)

[⚡ Web Performance](https://blog.blazingcdn.com/web-performance?hsLang=en)

[🎬Video & Streaming ▾](https://blog.blazingcdn.com/video-streaming-cdn?hsLang=en)

[🔴 Live Streaming](https://blog.blazingcdn.com/live-streaming?hsLang=en) [📺 VOD & OTT](https://blog.blazingcdn.com/vod-ott?hsLang=en) [💰 Bandwidth & Costs](https://blog.blazingcdn.com/bandwidth-costs?hsLang=en)

[🏭 Other Industries ▾](https://blog.blazingcdn.com/cdn-industry-insights?hsLang=en)

[📺 Media & Broadcasting](https://blog.blazingcdn.com/media-broadcasting?hsLang=en) [💾 Software & SaaS](https://blog.blazingcdn.com/software-saas?hsLang=en) [🏗️ DevOps & Cloud Infra](https://blog.blazingcdn.com/devops-cloud-infra?hsLang=en) [📚 AdTech & Advertising](https://blog.blazingcdn.com/adtech-advertising?hsLang=en) [🎮 Gaming & Esports](https://blog.blazingcdn.com/gaming-esports?hsLang=en) [📱 Mobile Apps & Developers](https://blog.blazingcdn.com/mobile-apps-developers?hsLang=en) [🤖 AI & Machine Learning](https://blog.blazingcdn.com/ai-machine-learning?hsLang=en) [🏛️ Enterprise & Corporate](https://blog.blazingcdn.com/enterprise-corporate?hsLang=en) [📚 E-Learning & EdTech](https://blog.blazingcdn.com/e-learning-edtech?hsLang=en) [🏟️ Sports & Live Events](https://blog.blazingcdn.com/sports-live-events?hsLang=en)

[💰 Pricing & Costs ▾](https://blog.blazingcdn.com/cdn-pricing-and-cdn-costs?hsLang=en)

[Provider Pricing](https://blog.blazingcdn.com/provider-pricing?hsLang=en) [Cost Optimization](https://blog.blazingcdn.com/cost-optimization?hsLang=en) [Decision Support](https://blog.blazingcdn.com/decision-support?hsLang=en)

[⚡Compare ▾](https://blog.blazingcdn.com/cdn-comparison?hsLang=en)

[Provider Comparisons](https://blog.blazingcdn.com/provider-comparisons?hsLang=en) [Strategy Comparisons](https://blog.blazingcdn.com/strategy-comparisons?hsLang=en) [Ratings & Benchmarks](https://blog.blazingcdn.com/cdn-ratings-and-benchmarks?hsLang=en)

[📊 Benchmarks](https://blog.blazingcdn.com/cdn-ratings-and-benchmarks?hsLang=en)

[🔒 Security ▾](https://blog.blazingcdn.com/cdn-security?hsLang=en)

[Attack Protection](https://blog.blazingcdn.com/attack-protection?hsLang=en) [Encryption & Access](https://blog.blazingcdn.com/encryption-access?hsLang=en) [Video & DRM Security](https://blog.blazingcdn.com/video-drm-security?hsLang=en)

[📁 Case Studies](https://blog.blazingcdn.com/case-studies) [🔌 Integrations](https://blog.blazingcdn.com/integrations?hsLang=en) [🛠️ Tools](https://blog.blazingcdn.com/cdn-tools?hsLang=en)

[Get Started](https://blazingcdn.com/sign-up-contact-form/)

### [![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Aug-10-2026-09-47-39-9642-AM.png) By BlazingCDN August 10, 2026 Debugging Cache Headers With curl: A Practical Walkthrough](https://blog.blazingcdn.com/en-us/debugging-cache-headers-with-curl-a-practical-walkthrough?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-13-2026-07-30-24-3649-AM.jpeg) Learn](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

Learn

## [CBR vs VBR: Choosing a Bitrate Mode for Streaming](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

 For most on-demand video, capped variable bitrate (VBR) wins the cbr vs vbr decision: it spends bits where the picture needs them and typically delivers equal visual quality in 20 ...

 Vadym Borovskyi · Oct 13, 2026, 9:32:48 AM [Read article](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-13-2026-07-01-14-3701-AM.jpeg)](https://blog.blazingcdn.com/en-us/azure-cdn-vs-aws-cloudfront-which-is-better-for-enterprise-content-delivery?hsLang=en)

Compare

### [Azure Front Door vs AWS CloudFront: Enterprise CDN Comparison](https://blog.blazingcdn.com/en-us/azure-cdn-vs-aws-cloudfront-which-is-better-for-enterprise-content-delivery?hsLang=en)

Oct 13, 2026, 9:03:40 AM

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-12-2026-07-30-18-1504-AM.jpeg)](https://blog.blazingcdn.com/en-us/what-is-a-keyframe-gop-size-and-keyframe-interval?hsLang=en)

Learn

### [What Is a Keyframe? GOP Size and Keyframe Interval](https://blog.blazingcdn.com/en-us/what-is-a-keyframe-gop-size-and-keyframe-interval?hsLang=en)

Oct 12, 2026, 9:31:59 AM

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-12-2026-07-01-19-9802-AM.jpeg)](https://blog.blazingcdn.com/en-us/set-up-microsoft-cdn-via-azure-step-by-step-guide-pricing-inside?hsLang=en)

Learn

### [Azure CDN Setup and Pricing 2026: Front Door Migration Guide](https://blog.blazingcdn.com/en-us/set-up-microsoft-cdn-via-azure-step-by-step-guide-pricing-inside?hsLang=en)

Oct 12, 2026, 9:03:58 AM

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-11-2026-07-30-21-7745-AM.jpeg)](https://blog.blazingcdn.com/en-us/hardware-vs-software-video-encoding-nvenc-qsv-and-x264?hsLang=en)

Learn

### [Hardware vs Software Video Encoding: NVENC, QSV and x264](https://blog.blazingcdn.com/en-us/hardware-vs-software-video-encoding-nvenc-qsv-and-x264?hsLang=en)

Oct 11, 2026, 9:33:05 AM

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-11-2026-07-00-58-2135-AM.jpeg)](https://blog.blazingcdn.com/en-us/cloudflare-vs-akamai-which-cdn-is-better-for-enterprise?hsLang=en)

Compare

### [Cloudflare vs Akamai: Which CDN Is Better for Enterprise?](https://blog.blazingcdn.com/en-us/cloudflare-vs-akamai-which-cdn-is-better-for-enterprise?hsLang=en)

Oct 11, 2026, 9:03:06 AM

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-10-2026-07-30-18-3215-AM.jpeg)](https://blog.blazingcdn.com/en-us/av1-vs-hevc-which-codec-should-streaming-platforms-choose?hsLang=en)

Video - Video & Streaming

### [AV1 vs HEVC: Which Codec Should Streaming Platforms Choose](https://blog.blazingcdn.com/en-us/av1-vs-hevc-which-codec-should-streaming-platforms-choose?hsLang=en)

Oct 10, 2026, 9:32:42 AM

## Latest articles

[View all →](https://blog.blazingcdn.com/blog?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-13-2026-07-30-24-3649-AM.jpeg)](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

Learn

### [CBR vs VBR: Choosing a Bitrate Mode for Streaming](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

For most on-demand video, capped variable bitrate (VBR) wins the cbr vs vbr decision: it spends bits where ...

Oct 13, 2026, 9:32:48 AM [Read more](https://blog.blazingcdn.com/en-us/cbr-vs-vbr-choosing-a-bitrate-mode-for-streaming?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-13-2026-07-01-14-3701-AM.jpeg)](https://blog.blazingcdn.com/en-us/azure-cdn-vs-aws-cloudfront-which-is-better-for-enterprise-content-delivery?hsLang=en)

Compare

### [Azure Front Door vs AWS CloudFront: Enterprise CDN Comparison](https://blog.blazingcdn.com/en-us/azure-cdn-vs-aws-cloudfront-which-is-better-for-enterprise-content-delivery?hsLang=en)

As of October 2026, the Azure service that matches Amazon CloudFront is Azure Front Door Standard or Premium: ...

Oct 13, 2026, 9:03:40 AM [Read more](https://blog.blazingcdn.com/en-us/azure-cdn-vs-aws-cloudfront-which-is-better-for-enterprise-content-delivery?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-12-2026-07-30-18-1504-AM.jpeg)](https://blog.blazingcdn.com/en-us/what-is-a-keyframe-gop-size-and-keyframe-interval?hsLang=en)

Learn

### [What Is a Keyframe? GOP Size and Keyframe Interval](https://blog.blazingcdn.com/en-us/what-is-a-keyframe-gop-size-and-keyframe-interval?hsLang=en)

In answer to what is a keyframe: a keyframe, or I-frame, is a video frame encoded without reference to any ...

Oct 12, 2026, 9:31:59 AM [Read more](https://blog.blazingcdn.com/en-us/what-is-a-keyframe-gop-size-and-keyframe-interval?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-12-2026-07-01-19-9802-AM.jpeg)](https://blog.blazingcdn.com/en-us/set-up-microsoft-cdn-via-azure-step-by-step-guide-pricing-inside?hsLang=en)

Learn

### [Azure CDN Setup and Pricing 2026: Front Door Migration Guide](https://blog.blazingcdn.com/en-us/set-up-microsoft-cdn-via-azure-step-by-step-guide-pricing-inside?hsLang=en)

New Azure CDN deployments now go only one way: Microsoft stopped accepting new Azure CDN Standard from ...

Oct 12, 2026, 9:03:58 AM [Read more](https://blog.blazingcdn.com/en-us/set-up-microsoft-cdn-via-azure-step-by-step-guide-pricing-inside?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-11-2026-07-30-21-7745-AM.jpeg)](https://blog.blazingcdn.com/en-us/hardware-vs-software-video-encoding-nvenc-qsv-and-x264?hsLang=en)

Learn

### [Hardware vs Software Video Encoding: NVENC, QSV and x264](https://blog.blazingcdn.com/en-us/hardware-vs-software-video-encoding-nvenc-qsv-and-x264?hsLang=en)

Evaluated October 2026: for live video, a modern GPU hardware encoder (NVIDIA NVENC on Turing or newer, Intel ...

Oct 11, 2026, 9:33:05 AM [Read more](https://blog.blazingcdn.com/en-us/hardware-vs-software-video-encoding-nvenc-qsv-and-x264?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-11-2026-07-00-58-2135-AM.jpeg)](https://blog.blazingcdn.com/en-us/cloudflare-vs-akamai-which-cdn-is-better-for-enterprise?hsLang=en)

Compare

### [Cloudflare vs Akamai: Which CDN Is Better for Enterprise?](https://blog.blazingcdn.com/en-us/cloudflare-vs-akamai-which-cdn-is-better-for-enterprise?hsLang=en)

Cloudflare vs Akamai for enterprise usually comes down to operating model. As of October 2026, Akamai ...

Oct 11, 2026, 9:03:06 AM [Read more](https://blog.blazingcdn.com/en-us/cloudflare-vs-akamai-which-cdn-is-better-for-enterprise?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-10-2026-07-30-18-3215-AM.jpeg)](https://blog.blazingcdn.com/en-us/av1-vs-hevc-which-codec-should-streaming-platforms-choose?hsLang=en)

Video - Video & Streaming

### [AV1 vs HEVC: Which Codec Should Streaming Platforms Choose](https://blog.blazingcdn.com/en-us/av1-vs-hevc-which-codec-should-streaming-platforms-choose?hsLang=en)

For most streaming platforms in 2026 the answer to AV1 vs HEVC is both: HEVC as the broad-reach premium ...

Oct 10, 2026, 9:32:42 AM [Read more](https://blog.blazingcdn.com/en-us/av1-vs-hevc-which-codec-should-streaming-platforms-choose?hsLang=en)

[![](https://blog.blazingcdn.com/hubfs/Gemini-Blog/image-Oct-10-2026-07-00-45-3145-AM.jpeg)](https://blog.blazingcdn.com/en-us/vercel-cdn-internals-how-edge-network-boosts-nextjs-apps?hsLang=en)

Learn

### [Vercel Edge Network Explained: How Vercel's CDN Works](https://blog.blazingcdn.com/en-us/vercel-cdn-internals-how-edge-network-boosts-nextjs-apps?hsLang=en)

The Vercel CDN puts edge points of presence (PoPs) in front of 20 compute regions, as listed in Vercel ...

Oct 10, 2026, 9:03:30 AM [Read more](https://blog.blazingcdn.com/en-us/vercel-cdn-internals-how-edge-network-boosts-nextjs-apps?hsLang=en)

[![BlazingCDN](https://blog.blazingcdn.com/hubfs/Logo/blog-logo-w.png)](https://blog.blazingcdn.com?hsLang=en)

[📘 Learn](https://blog.blazingcdn.com/cdn-learn?hsLang=en) [📊 Benchmarks](https://blog.blazingcdn.com/cdn-ratings-and-benchmarks?hsLang=en) [🎬 Video & Streaming](https://blog.blazingcdn.com/video-streaming-cdn?hsLang=en) [🏭 Industries](https://blog.blazingcdn.com/cdn-industry-insights?hsLang=en) [💰 Pricing & Costs](https://blog.blazingcdn.com/cdn-pricing-and-cdn-costs?hsLang=en) [⚡ Compare](https://blog.blazingcdn.com/cdn-comparison?hsLang=en) [🔒 Security](https://blog.blazingcdn.com/cdn-security?hsLang=en) [🛠️ Tools](https://blog.blazingcdn.com/cdn-tools?hsLang=en) [✍️ Publish with us](https://blog.blazingcdn.com/publish-with-us?hsLang=en)

[in](https://www.linkedin.com/company/68261278) [𝕏](https://x.com/BlazingCdn) [✉](mailto:marketing@blazingcdn.com)

 Copyright © BlazingCDN |. All rights reserved.

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