Internet CS Thinking Example 3
Follow the full solution, then compare it with the other examples linked below.
Example 3
mediumExplain what an IP address is and why DNS is needed. What would browsing the web be like without DNS?
Solution
- 1 Step 1: An IP address is a unique numerical address for every device on the internet (e.g., 142.250.80.46 for Google). Computers use IP addresses to find each other.
- 2 Step 2: DNS translates human-readable domain names (google.com) into IP addresses. Without DNS, you would need to remember numerical addresses for every website — like using phone numbers instead of contact names.
Answer
IP addresses identify devices numerically. DNS translates domain names to IP addresses. Without DNS, you would need to memorise numbers for every website.
DNS is often called the 'phone book of the internet'. It is a critical piece of infrastructure — if DNS fails, the internet effectively becomes unusable for most people, even though the network itself still works.
About Internet
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.
Learn more about Internet →More Internet Examples
Example 1 easy
What is the difference between the internet and the World Wide Web (WWW)?
Example 2 mediumDescribe what happens step by step when you type 'www.example.com' into a web browser and press Ente
Example 4 hardExplain why the internet is described as a 'network of networks'. How does this decentralised struct