What Is a CDN?

A CDN, or content delivery network, serves website assets from locations closer to visitors. Instead of every visitor downloading every file directly from the origin server, the CDN can cache files at edge locations around the world.

For many small business websites, a CDN is useful for static files such as images, CSS, JavaScript, fonts, downloads, and cached pages. It is not a magic fix for slow application code.

What a CDN Can Help With

Serving images and static assets faster to visitors far from the hosting server.
Reducing repeated requests to the origin server.
Absorbing some traffic spikes for cacheable content.
Adding DNS and edge security features, depending on the provider.

What a CDN Cannot Fix

A CDN will not fix slow PHP, poor database queries, overloaded plugins, huge uncached pages, broken checkout logic, or a badly configured WordPress site. If the origin server takes too long to generate the HTML, the CDN may only hide the problem for cacheable visitors.

Static Versus Dynamic Pages

Static assets are usually safe to cache. Dynamic pages need more care. Do not blindly cache account pages, baskets, checkouts, admin dashboards, or private content unless the application and CDN rules are designed for it.

CDN and DNS

Some CDN setups require changing nameservers. Others use CNAME records for specific hostnames. Before changing DNS, document existing MX, SPF, DKIM, DMARC, verification, and service records so email and third-party tools do not break.

CDN and SSL

The CDN and origin server both need correct HTTPS handling. If the CDN connects to the origin over the wrong protocol, you can get redirect loops, mixed content warnings, or certificate errors.

How to Check Whether a CDN Is Helping

Compare first load and repeat load times.
Check response headers for cache status.
Test from more than one region if your audience is international.
Check that logged-in and checkout pages are not cached incorrectly.
Review origin server load before and after CDN rules are enabled.

TekLan Hosting Notes

TekLan shared hosting already gives you Enhance tools for SSL, files, PHP, databases, backups, and email. Add a CDN when it solves a specific problem: global visitors, static asset delivery, edge caching, or extra DNS/security features.