An SRV record is a DNS record, which is used to forward a domain name to a third-party server and employ it for some service different from a web 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 which the domain name will use and the port, which is to be employed to connect to the remote server. In addition, provided that you have a few SRV records for the exact same service, you could set individual priorities and weights for each one of them, so you're able to send out the load between a number of machines. Such a record will allow 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 the services from just one service provider.