An SRV record, which is short for Service record, is a DNS entry which is used to define the servers which run a certain service for a domain name. Put simply, you will be able to use your domain name not only for a site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, as an example, while you still have a site with it. When you set up the SRV record, you can select what Internet Protocol it's going to employ, on which port the connection to the specific server is going to be established as well as the priority and the weight of the record provided that there are several SRV records for the exact same service. The second option will enable you to use different machines for load balancing and redundancy. Using this type of DNS records, you can use the same domain name for a variety of purposes and even with different providers in case the same one is not able to provide all services you require.