Back to topics

How does a website name become an internet address?

You remember a website by its name, while the network needs an address for the connection. DNS supplies that translation, sometimes from a saved answer and sometimes by asking other servers.

4–5 min

Questions you could explore

  • Who can give an authoritative answer about a domain name?
  • What does caching change about the lookup?

Start reading

  • CloudflareWhat is DNS?

    Cloudflare explains the servers involved in DNS lookups and how caching can shorten the process.

Ready to try your ideas aloud?

Your topic carries over. Record up to 2½ minutes, depending on your plan.

Computers and AI

Why can a damaged QR code still work?

A scratch or stain does not always stop a QR code from being read. Its stored information includes redundancy, but that does not mean any part of the image can be covered without consequence.

3–5 min

Why can a damaged QR code still work?

Computers and AI3–5 minA scratch or stain does not always stop a QR code from being read. Its stored information includes redundancy, but that does not mean any part of the image can be covered without consequence.

Computers and AI

Same emoji, different picture

The same emoji can arrive with a different expression or style from the one you saw when sending it. Unicode identifies characters and sequences, while software platforms choose artwork and decide what their versions support.

2–3 min

Same emoji, different picture

Computers and AI2–3 minThe same emoji can arrive with a different expression or style from the one you saw when sending it. Unicode identifies characters and sequences, while software platforms choose artwork and decide what their versions support.

Computers and AI

Can counting repeats make a picture smaller?

A row of identical pixels contains a lot of repetition. Run-length encoding stores how long each stretch lasts, but the saving depends on the pattern and on how the counts themselves are recorded.

3–5 min

Can counting repeats make a picture smaller?

Computers and AI3–5 minA row of identical pixels contains a lot of repetition. Run-length encoding stores how long each stretch lasts, but the saving depends on the pattern and on how the counts themselves are recorded.

How does a website name become an internet address? | Speech Topic | speaking.app