Hosting Glossary
What is CDN?
CDN in plain English — the definition, the analogy, and why it matters to anyone who runs a website.
The short answer
A CDN caches your site's assets on servers around the world, serving each visitor from the nearest edge instead of your origin.
Below: the fuller explanation, an analogy that makes it stick, why it matters in practice, and where you'll actually meet it.
Written by the HostingAlly team · Last revised 27 July 2026
100+
Terms in this glossary
2 min
Average read
Plain
English, promised
24/7
Humans if you're stuck
Distance is latency — an edge node continents closer cuts round-trip times for images, scripts and sometimes whole pages. Many CDNs bundle security layers (WAF, DDoS absorption) atop the delivery role.
Its value scales with audience geography: global readerships gain dramatically; single-country sites on well-placed hosting gain modestly — measurement beats fashion.
The analogy version
Regional warehouses for a mail-order business — orders ship from the depot nearest each customer instead of one central works, and the head office (origin) handles only what depots can't stock.
Analogies simplify, of course — but this one holds up well enough to reason with, and reasoning is the point of a glossary.
What this means for your site
For distributed audiences a CDN is the biggest latency lever after caching itself — and its purge behaviour joins your cache-invalidation ritual the day you adopt one.
You don't need to operate this layer daily — you need to recognise it when it's the explanation for something, which is exactly when this page pays for itself.
What it looks like in practice
A tutorial site with worldwide readers serves its images from in-region edges — the Sydney visitor's assets arrive from Sydney, not from a European origin's round trip.
Multiply that example across every site on the internet and you have the concept's entire job description.
Where you'll meet it on our platform
You'll meet it in the control panel and occasionally in a support conversation — usually already configured the right way. If this term made sense, the natural next reads are Cache, DDoS Attack, Bandwidth and Nginx.
Business email on your own domain is included, not sold back as an add-on.
Jargon is a service failure
We think unexplained jargon is a service failure — this glossary is the support desk's accumulated translations, published where the search engines can hand them out.
Every plan includes free SSL that renews itself, so the padlock is never your job.
- 100+ terms, plain English
- Analogies and real examples
- Cross-linked related concepts
- Written by the support desk
Why HostingAlly
Every plan includes this, whatever you pay
Grounded in a real platform
Examples reference the hosting you'd actually use, not abstract diagrams.
One term, fully landed
CDN defined, pictured by analogy and placed in your own control panel — recognise-level in a single read.
The next reads, mapped
This entry connects to Cache and DDoS Attack — concepts travel in packs, and the pack is linked.
The practical stakes named
Not just what it is — when it's the answer to a problem you're having.
Honest about what you can skip
Most terms are recognise-level, not operate-level — the glossary says which is which.
Analogies that stick
Each concept gets a picture you'll remember at the moment you actually need it.
Getting Started
How to get going
- 1
Spot it in your own setup
Open your control panel and find where this concept lives — seeing it attached to your own site is what converts definition into understanding.
- 2
Check the defaults
Confirm how your account has this configured — usually correctly by default here, and now you'll know rather than guess.
- 3
Follow the related terms
Concepts travel in packs — Cache, DDoS Attack and Bandwidth complete this one's picture, and each is a two-minute read away.
Included
What's covered on our plans
- Upgrades apply in place — no migrations between plans
- Renewal prices that match signup prices
- No setup fees, ever
- DDoS protection at the network level
- Free domain for the first year on annual plans
- Daily automatic backups with self-service restores
- Free website migration handled by our team
- WordPress Toolkit with automatic updates
- NVMe SSD storage as standard
- 99.9% uptime commitment, monitored around the clock
FAQ
Your questions, answered
Does every site need a CDN?
No — a UK-audience site on good European hosting sees marginal gains. Adopt for geographic spread, heavy static assets, or the bundled security; skip when measurement says your latency is already local.
CDN or better hosting — which first?
Hosting and caching first — a CDN accelerates delivery of what the origin produces; it can't fix slow production. Fast origin plus CDN is the compounding order.
Do you monitor uptime, and what do you commit to?
We commit to 99.9% uptime and monitor continuously — not a marketing number but an operational one, with alerting that usually has us fixing issues before customers notice them.
Do you include email with hosting?
Yes — mailboxes on your own domain come with every hosting plan, with webmail, IMAP/POP/SMTP access and spam filtering. Standalone email hosting also exists for domains whose websites live elsewhere.
Is SSL really included at no cost?
On every plan, with no exceptions — certificates are issued automatically when your domain points to us and renew themselves before expiry. The encryption is identical to paid DV certificates; paid tiers exist only for wildcard convenience or organisation-level validation.
Where is your company based?
HostingAlly is a trading name of Fairdeal Renovations Limited, a company registered in England and Wales — a real, verifiable business with published terms under English law, which is worth checking about any host before you hand them your domain.
Where are your servers located?
Our hosting infrastructure runs from European datacentres with London at the core, behind server-level caching that keeps cached pages fast worldwide. For most sites, platform quality — NVMe storage, LiteSpeed, sensible server density — matters far more than the datacentre's postcode.
Keep exploring
DDoS Attack
A DDoS attack floods a target with traffic from many sources at once, aiming to exhaust its capacity and knock it offline.
Cache
A cache stores the results of expensive work for instant reuse.
Domain Names
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WordPress Hosting
Managed WordPress with LiteSpeed caching, staging and automatic backups.
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