A global network of interconnected computer networks that communicate using standardized protocols (TCP/IP). The internet is decentralized—no single authority controls it. It connects billions of devices worldwide by routing data as packets through a shared infrastructure of cables, routers, and wireless links.
The internet is the world's biggest network — it connects smaller networks together so any device can talk to any other device, anywhere.
Showing a random 20 of 50 problems.
Example 1
medium
A friend says 'the Web went down so the internet is gone.' Correct the statement precisely.
Example 2
challenge
Explain how packet switching plus decentralization together make the internet fault-tolerant.
Example 3
challenge
A student claims 'I downloaded an app, so I used the Web.' When is this wrong?
Example 4
easy
The internet and the World Wide Web are the same thing. True or false?
Example 5
easy
Sending an email and loading a webpage both use the internet but different ____.
Example 6
easy
What makes billions of different devices able to communicate on the internet?
Example 7
easy
True or false: An IP address uniquely identifies a device on the internet.
Example 8
easy
What does DNS stand for?
Example 9
medium
Why does the internet keep working even if some routers fail?
Example 10
hard
Explain why the internet is described as a 'network of networks'. How does this decentralised structure make it resilient?The internet is a network of networks. Why does this make it resilient?
Example 11
easy
Does data on the internet usually travel directly from sender to receiver? Yes or no.
Example 12
medium
A packet has 5 hops to its destination. Each hop adds 10 ms. What is the minimum total latency just from hops?Each of the 5 hops adds 10 ms. What is the total minimum latency?
Example 13
hard
A CDN places copies of a website's content in many cities. How does this improve speed for users?A CDN places content closer to users. How does this improve speed?
Example 14
challenge
Why can two people in different countries on different ISPs still load the same website?
Example 15
easy
Which protocol family lets the internet route data between networks?
Example 16
medium
Why does the internet need standardized protocols?
Example 17
easy
Which is hardware: a router or HTTP?
Example 18
hard
Why are passwords sent over HTTP (not HTTPS) dangerous?
Example 19
easy
Who manages your home internet connection physically?