It basically stand for an education domain name
.ac or .edu
The edu part at the end.
.edu
.edu stands for education like a University website
network
Resource Locator
You get past it by using a proxy server Or add .edu to the url. (?.edu for downloads)
.ac or .edu
it is tha domain name
EDU: EducationGOV: GovernmentCOM: Commercial
education
In this URL, nyu.edu is the host name.