DNS blocking can also be applied for outgoing requests as well. Instead of returning the valid IP address of a requested site (for example, instead of 198.35.26.96 being returned by the DNS when "www.wikipedia.org" is entered into a browser,[3] if this IP were on a block list, the DNS might reply that the domain is unknown or with a different IP address that directs to a site with a page stating that the requested domain is not permitted). The latter case where the user is redirected to another destination would be considered DNS Spoofing, otherwise known as "DNS Poisoning".[4] DNS blocking can be applied to individual servers/IP address, or entire blocks of IP addresses.