When a user visits a website, the browser may save images, scripts and other components in a local cache. On subsequent visits, it can load these elements from the cache instead of downloading them again, reducing bandwidth use and improving loading times. This caching mechanism is a standard ICT technique for optimising user experience on the web.
Option A:
This option correctly describes how caching works: the browser keeps temporary copies of page elements so that later visits are faster and require fewer network requests. This improves performance and reduces bandwidth consumption.
Option B:
This option incorrectly suggests that a browser cache can permanently delete all websites from the Internet. A cache only stores local copies; it has no control over whether sites exist on remote servers.
Option C:
Associating the cache with hardware circuit design confuses software-level optimisation with physical network engineering. Router circuits are designed by engineers, not by browser caching mechanisms.
Option D:
Caching does not prevent pages from being reloaded; it simply affects where elements are loaded from. Users can always refresh pages, and servers can force new downloads when content changes.
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