View source for Change detection and notification

'''Change detection and notification''' ('''CDN''') refers to automatic detection of changes made to [[Web page|web pages]] and notification to interested [[User (computing)|users]] by [[email]] or other means.

== Description ==

CDN systems are designed to monitor changes to web pages.

Before change detection and notification, it was necessary for users to manually check for web page changes, either by revisiting web sites or periodically searching again.

== Limitations ==

Efficient and effective change detection and notification is hampered by the fact that most servers do not accurately track content changes through Last-Modified or [[HTTP ETag|ETag headers]].

== See also ==

* [[HTTP ETag]]
* [[Weg page]]
* [[World Wide Web]]

==  External links ==

* [https://en.wikipedia.org/wiki/Change_detection_and_notification Change detection and notification] @ Wikipedia