The underlying mechanism of advertising on websites

The underlying mechanism of advertising on the website

We can go through Wireshark Fetching the data , such as HTTP Of requests, We can see many domain names related to our website , They all contain cdn word , This is a content delivery network, It is a content distribution network service .

There may be text in a web page , picture , Video and other resources . The possible scenario is , The content of the text is in one place , The image is in another place , The embedded video is in the third place , This does not include advertising , Advertisements may be located on many independent servers , Distributed by multiple providers .

When HTTP Client resolution HTML Code , Found references to resources on other servers , To get the referenced content , The client tries to query the relevant server , This leads to additional DNS Query and HTTP request , When he wants to view content from a single source ,HTML The code references the contents of other sources , His browser automatically requests content from multiple other domains .

We know there are additional requests , We can check the session related to each request statistics>conversations, View these sessions