An SRV record is a DNS record, that is used to forward a domain name to a third-party server and employ it for a 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 which the domain will use and the port, which will be used to connect to the remote server. Additionally, provided that you have a few SRV records for the very same service, you'll be able to set different priorities and weights for every one of them, in order to spread the load between a number of machines. Such a record will enable you to use the same domain address or subdomains under it with different providers, so you can employ it for many purposes even if you are not able to get all services from a single provider.