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