What is a data center and why are they important to the internet?

A facility housing thousands of servers that stores and processes data for websites, cloud services, and applications — the physical backbone of the internet A government building where internet traffic is monitored for security A shop where customers can buy data storage devices The central hub where all internet cables connect in each country

What is a DDoS attack and how does it work?

Distributed Denial of Service — flooding a server with millions of fake requests from thousands of hijacked computers, overwhelming it so legitimate users can't reach it Downloading data from a server so fast that it crashes from the speed Hacking into a server and deleting all its files remotely Distributing malware through download links to disable users' computers

What is 'internet censorship' and how do governments implement it technically?

Blocking access to websites or content using DNS blocking, IP blocking, or deep packet inspection at the ISP level Governments delete websites from internet servers they disapprove of Sending police to arrest website owners for posting forbidden content Automatically editing webpage content as it's downloaded so users see approved versions

What is 'digital divide' and why does it matter?

The gap between those who have reliable internet access and digital skills, and those who don't — creating unequal access to education, jobs, and information The difference in speed between wired and wireless internet connections The separation between digital and physical retail stores The technical split between IPv4 and IPv6 networks

Why can't a country simply 'turn off the internet' within its borders?

The internet has many redundant connections entering a country, and some services (finance, hospitals) would fail — though some countries have done it at great social and economic cost International treaties prevent any country from restricting internet access The internet runs on satellites that no country can control You can't turn off the internet because it has no central control point

What is 'bandwidth' and how is it different from speed?

Bandwidth is the maximum capacity of a connection (how wide the pipe is); speed is how fast data actually transfers given current conditions Bandwidth and speed mean exactly the same thing Bandwidth is measured in milliseconds; speed is measured in megabits Bandwidth is for downloads; speed is for uploads

What is a VPN (Virtual Private Network) and what does it actually protect you from?

A VPN encrypts your traffic and routes it through a server in another location — hiding your activity from your ISP and changing your apparent IP address A VPN makes your internet connection faster by finding the shortest route A VPN makes you completely anonymous online — websites can never identify you A VPN is only for businesses — it has no benefit for individual users

How has the internet changed the way people get news and information, for better and worse?

Better: instant access to global news and diverse sources. Worse: misinformation spreads as fast as truth, and algorithms create echo chambers showing only views you already agree with The internet has only improved news — traditional media had more bias The internet has made news worse — there was more accurate information before it News hasn't changed — the internet just moved print newspapers online

What is 'internet of things' (IoT) infrastructure, and why does it create new security challenges?

Billions of internet-connected devices (thermostats, cameras, fridges) that often have weak security — creating entry points for attackers into home and corporate networks A specialized secure internet used only by industrial machinery and factories Internet connections that use physical objects like keyboards and mice as relays A government program to connect rural areas to the internet

What was ARPANET and why is it historically significant?

ARPANET was a 1969 US military research network — the first network to use packet switching and the direct ancestor of today's internet ARPANET was the first commercial internet service provider, launched in 1985 ARPANET was a space communications network used to communicate with the Moon ARPANET was the original name for the World Wide Web before Tim Berners-Lee renamed it