Pull is used extensively on the Internet for HTTP page requests from websites.
A push can also be simulated using multiple pulls within a short amount of time.
A trade-off of this system is that it places a heavier load on both the server and network to function correctly.
This continual polling is inefficient and has contributed to the shutdown or reduction of several popular RSS feeds that could not handle the bandwidth.
[1][2] For solving this problem, the WebSub protocol, as another example of a push code, was devised.