An SRV record is a DNS record, which is used to direct a domain to a third-party server and employ it for a service different from a site. This can be a Voice-Over-IP server, a video streaming service, an instant messaging system, and so on. When an SRV record is set up, you are able to specify an Internet Protocol which the domain name will use and the port, that will be employed to connect to the remote server. Also, if you have several SRV records for the very same service, you'll be able to set individual priorities and weights for every one of them, in order to spread the load between several machines. Such a record will enable you to employ the same domain or subdomains under it with different providers, so you could employ it for different purposes even if you are unable to get all of the services from just one provider.