An SRV record is a DNS record, that is used to point a domain to a third-party server and employ it for a service different from an Internet site. This could be a Voice-Over-IP server, a video streaming service, an instant messaging system, etc. When an SRV record is created, you can specify an Internet Protocol that the domain will use and the port, that will be used to connect to the remote server. In addition, if you have many SRV records for the exact same service, you could set various priorities and weights for every single one of them, so that you can distribute the load between a number of machines. Such a record allows you to employ the same domain or subdomains under it with different companies, so you can use it for various purposes even if you can't get all of the services from one provider.