An SRV record is a DNS record, that is used to forward a domain name to a third-party server and use it for some service different from an Internet site. 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 could specify an Internet Protocol the domain address will use and the port, that will be used to connect to the remote server. Also, provided that you have many 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 send out the load between many machines. Such a record will enable you to employ the same domain name or subdomains under it with different companies, so you could use it for various purposes even if you cannot get all of the services from a single provider.