An SRV record is a DNS record, that is used to direct a domain name to a third-party server and employ it for a service different from a web site. This may be a Voice-Over-IP server, a video streaming service, an instant messaging system, etc. When an SRV record is created, you could specify an Internet Protocol which the domain name will use and the port, which is to be used to connect to the remote server. Additionally, in case you have a few SRV records for the same service, you could set various priorities and weights for every one of them, so you're able to spread the load between many machines. Such a record will permit you to use the same domain or subdomains under it with different providers, so you're able to employ it for many purposes even if you can't get all the services from just one service provider.