IT Glossary
What is a CDN?
Content Delivery Network: a globally distributed set of servers that serves copies of your website from the city closest to each visitor.
Every online store discovers the same fact when its first overseas customer complains: a website hosted in one country loads noticeably slower on another continent, because every image crosses the ocean. A CDN — content delivery network — fixes this with servers spread around the world that keep copies of your site's files and hand them to each visitor from the nearest location. The business effects are concrete. Loading speed becomes consistent wherever your customers are, which matters the moment you sell beyond your home market or target travelers. Traffic spikes stop being frightening, because a viral campaign is absorbed by the network rather than by your single origin server. And large CDNs swallow DDoS attacks at network level, giving you a security layer you never had to build. The surprising part is the price: for an ordinary business site, the free tiers — Cloudflare being the de facto standard — cover everything that matters, and activation is roughly an hour's work at the DNS level.
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Why it matters for your business
Equal speed for every customer
A visitor in Berlin, London or Chicago gets your site from their own region — not from the one server you happen to rent.
Traffic spikes stop hurting
A successful campaign or press mention sends waves the CDN absorbs — your origin server barely notices them.
DDoS shield included
Volumetric attacks hit the CDN's global infrastructure, sized for traffic thousands of times larger than yours.
Frequently asked questions
Our customers are all in one country — do we still need a CDN?
The distance benefit shrinks, but the others remain: absorption of traffic spikes, DDoS protection, caching that offloads your server and a managed TLS certificate. At the zero cost of the basic tier, the practical answer is that there is no reason not to have one.
Does a CDN replace web hosting?
No — the site still lives on its origin server; the CDN is the distribution layer in front, serving copies and filtering traffic. The exception: modern static sites can be hosted entirely on CDN-style infrastructure.
How can I check whether my site already uses a CDN?
Free DNS and HTTP-header analysis tools show immediately whether traffic passes through Cloudflare, Fastly or CloudFront; if an agency built the site, simply ask them — enabling one later is straightforward anyway.
Let’s talk about your project
Message us on WhatsApp or send an email — you talk directly to a developer.
office@northdan.com · +40 752 070 247