An SRV record is a DNS record, which is used to point a domain to a third-party server and use it for some service different from a site. This could be a Voice-Over-IP server, a video streaming service, an instant messaging system, and so on. When an SRV record is set up, you are able to specify an Internet Protocol that the domain address will use and the port, that will be used to connect to the remote server. In addition, in case you have a few SRV records for the same service, you can set different priorities and weights for every one of them, so that you can distribute the load between a number of machines. Such a record will permit you to use the same domain name or subdomains under it with different providers, so you're able to employ it for many purposes even if you are not able to get all of the services from just one provider.