Question 1

What is a server, and what does hosting actually mean?

Accepted Answer

A **server** is a computer that provides services to other computers. **Hosting** is renting space on one so your website or application is available to others.

**What makes a server a server.** Not special hardware — the word describes a **role**, not a type of machine. Any computer running software that responds to requests from others is acting as a server. Your laptop can serve a website.

In practice, machines built for the role differ: designed for continuous operation, with redundant power supplies, error-correcting memory, remote management, and mounted in racks in a data centre with controlled power, cooling and connectivity.

**The client-server model.** One machine requests, another responds. Your browser is a **client**; the machine it contacts is a server. The same physical computer can be both for different purposes.

**The main hosting types**, roughly by cost and control:

**Shared hosting.** Many customers on one physical server, sharing its resources. Cheapest, and the trade-off is that another site's traffic spike can slow yours — the **noisy neighbour** problem.

**VPS (virtual private server).** A virtualised slice of a physical machine with guaranteed resources. More control, more responsibility.

**Dedicated server.** The whole machine. Maximum control and cost.

**Cloud hosting.** Resources drawn from a pool, scaling on demand, billed by use. The dominant model for anything with variable load.

**Managed hosting**, where the provider handles updates, security and backups — you pay more and do less.

**Serverless.** A misleading name: servers still exist, but you supply only code and the provider runs it on demand, billing per execution. You never manage a machine.

**Static hosting and CDNs**, serving files from edge locations near users.

**What you also need:** a **domain name**, registered separately and pointed at the host via **DNS**; an **SSL certificate**; and **backups**, which many cheap hosts do not include.

**Uptime guarantees** are worth reading — 99.9% still permits several hours of downtime a year.

Question 2

Where is "the cloud", physically?

Accepted Answer

In data centres — large buildings full of servers, owned by a handful of companies, in specific geographic locations. There is nothing ethereal about it. "The cloud" is a marketing term for someone

Question 3

What is the difference between a browser and a search engine?

Accepted Answer

A browser is a program on your device that displays web pages. A search engine is a website you visit to find other websites. They are different categories of thing, and the confusion is

Question 4

What is the difference between the internet and the web?

Accepted Answer

The internet is the global network of connected computers. The web is one service that runs on it. The web is part of the internet; the internet is far more than the web. The internet is

Question 5

What is an operating system actually doing?

Accepted Answer

An operating system sits between your hardware and your applications, managing resources so that programs do not have to know about the specific machine they run on — and so that they cannot

Question 6

What actually happens when you type a web address?

Accepted Answer

A surprising amount, in well under a second. The sequence is one of the most useful things to understand about how the internet works. The browser checks its caches. Browser cache, then the operating

Question 7

How do I set up a cloud computing setup for beginners?

Accepted Answer

Setting up a cloud computing environment involves choosing a provider, creating an account, selecting services, configuring security, and optimizing performance.

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