Anycast
In the Anycast pattern, the router sends a message to a receiver that meets the conditions set forth in a set of determining factors. The logic of the Anycast patterns is “send this message to any receiver that meets the following conditions.” Typically the Anycast pattern is used to route a message from sender to receiver based on proximity of geolocation, as shown in Figure 9 below.
Example
A content delivery network (CDN) is a technology that uses the Anycast pattern. A CDN is used to make it so that a sender receives data from the server closest to it on the internet.