```yaml
product: AlterLab
title: "Content Delivery Network (CDN) — Web Scraping Glossary | AlterLab"
comparison_context: "AlterLab is an alternative to Firecrawl, ScrapingBee, and Bright Data."
source_url: https://alterlab.io/glossary/content-delivery-network
```

protocol

# Content Delivery Network (CDN)

A distributed network of servers that delivers web content from locations geographically close to the user, often where anti-bot protection is deployed.

A Content Delivery Network (CDN) is a globally distributed network of servers — called edge nodes or Points of Presence (PoPs) — that cache and serve web content from locations close to end users. When a user in London requests a page from a US-hosted website, the CDN serves the response from a London edge server rather than routing all the way to the origin, dramatically reducing latency and load on the origin server.

For web scraping, CDNs are significant because the most widely deployed anti-bot protections (Cloudflare, Akamai, Fastly, Imperva) operate at the CDN edge — they intercept every request before it reaches the origin server. TLS termination, fingerprinting, bot scoring, and challenge serving all happen at the edge node closest to the scraper's proxy IP.

Geographic proximity affects scraping performance in two ways: CDN edge selection (a proxy IP in Europe hits a European edge, which may have different caching behaviour than the US edge) and origin round-trip (for cache misses, all edges must still contact the origin, adding latency). Understanding that anti-bot is deployed at the CDN layer explains why changing the target IP or port does not bypass the protection.

### What is Content Delivery Network (CDN)?

A distributed network of servers that delivers web content from locations geographically close to the user, often where anti-bot protection is deployed.

### How does AlterLab handle Content Delivery Network (CDN)?

Geographic proximity affects scraping performance in two ways: CDN edge selection (a proxy IP in Europe hits a European edge, which may have different caching behaviour than the US edge) and origin round-trip (for cache misses, all edges must still contact the origin, adding latency). Understanding that anti-bot is deployed at the CDN layer explains why changing the target IP or port does not bypass the protection.

## Related Terms

[Cloudflare Bot ManagementCloudflare's enterprise bot detection suite combining machine learning, browser fingerprinting, TLS fingerprinting, and JavaScript challenges.](https://alterlab.io/glossary/cloudflare-bot-management)[Akamai Bot ManagerAkamai's enterprise bot detection solution deployed at the CDN edge using sensor data, TLS fingerprinting, and IP reputation.](https://alterlab.io/glossary/akamai-bot-manager)[Anti-Bot ProtectionSystems deployed by websites to detect and block automated traffic using TLS fingerprinting, CAPTCHA challenges, and behavioural analysis.](https://alterlab.io/glossary/anti-bot-protection)[TLS FingerprintA signature derived from TLS handshake parameters a client sends when opening an HTTPS connection, used by anti-bot systems to classify traffic.](https://alterlab.io/glossary/tls-fingerprint)

## Extract Content Delivery Network (CDN) data from any website

AlterLab returns clean, structured data from any public URL — no scraper infrastructure needed. Start free, no credit card required.

[View API docs](https://alterlab.io/docs/api/rest)

[Back to Glossary](https://alterlab.io/glossary)