An SRV record is a DNS record, which is used to redirect a domain name to a third-party server and employ it for some service different from a web site. This can be a Voice-Over-IP server, a video streaming service, an instant messaging system, and many others. 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. Moreover, if you have a few SRV records for the same service, you'll be able to set different priorities and weights for every single one of them, so that you can distribute the load between many machines. Such a record will enable you to employ the same domain address or subdomains under it with different providers, so you're able to use it for different purposes even if you are unable to get all the services from just one provider.