A mirror page is an exact copy of a website under different URLs .
If, for example, www.1234567.de and www.abcdef.de each have identical content, but are on different servers, then they are mirror pages.
The main purpose of mirror pages is load balancing and redundancy for the purpose of security. Providers of heavily used download offerings distribute their offerings on several computers worldwide so that none of the servers is overloaded. If a server fails, all other mirrors are available unchanged.
Internet censorship , which is directed against a single URL, is often circumvented by creating multiple mirror pages , which are often created by different providers of free web space. This usually delays the final censorship of Internet sites by weeks, months or makes it completely impossible. The same mechanism is used by providers of infringing or criminally relevant material.