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Why do browsers cache DNS results and webpage content after requesting pages?

hard📝 Conceptual Q10 of 15
Intro to Computing - How the Internet Works
Why do browsers cache DNS results and webpage content after requesting pages?
ATo prevent the user from visiting the same site twice
BTo speed up future requests by avoiding repeated lookups and downloads
CTo save the webpage permanently on the server
DTo block access to certain websites
Step-by-Step Solution
Solution:

  1. Step 1: Understand caching purpose

    Caching stores data temporarily to reduce loading time on repeat visits.

  2. Step 2: Effect on future requests

    By caching DNS and content, the browser avoids repeated network requests, speeding up page loads.

  3. Final Answer:

    To speed up future requests by avoiding repeated lookups and downloads -> Option B

  4. Quick Check:

    Caching = faster future loads [OK]
Quick Trick: Cache saves time by reusing data [OK]
Common Mistakes:
  • Thinking cache blocks sites
  • Believing cache saves on server
  • Assuming cache prevents revisits

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