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, and so forth. When an SRV record is set up, you are able to specify an Internet Protocol the domain address will use and the port, that will be employed to connect to the remote server. Also, if you have a few SRV records for the same service, you are able to set individual priorities and weights for every single one of them, so you're able to spread the load between many machines. Such a record will allow you to use the same domain or subdomains under it with different companies, so you can use it for different purposes even if you cannot get all services from one service provider.