An SRV record, which signifies Service record, is a DNS entry which is used to identify the servers which run a particular service for a domain name. Put simply, you are able to use your Internet domain not just for a website, but also for an instant messaging server, a video streaming host or even a Voice-Over-IP server, for instance, while you still have a website 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 will be established as well as the priority and the weight of the record provided that there are several SRV records for the very same service. The second option will permit you to use different machines for load balancing and redundancy. With this type of DNS records, you could use the same domain for a number of purposes and even with different providers in case the same one can't provide all services that you need.