An SRV record is a DNS record, which is used to direct a domain to a third-party server and employ it for some service different from a 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 could specify an Internet Protocol which the domain name will use and the port, which will be employed to connect to the remote server. Moreover, provided that you have a few SRV records for the exact same service, you'll be able to set various priorities and weights for each and every one of them, so that you can send out the load between a number of machines. Such a record will permit you to employ the same domain name or subdomains under it with different providers, so you're able to use it for different purposes even if you can't get all of the services from just one provider.