An SRV record, which signifies Service record, is a DNS entry which is used to identify the servers that run a particular service for a domain. In other words, you are able to use your domain not just for a web site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for instance, while you still have an Internet site with it. Whenever you set up the SRV record, you can pick what IP it'll employ, on which port the connection to the specific server will be established plus 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 employ different machines for load balancing and redundancy. With this type of DNS records, you can use the same domain many different purposes and even with different providers in case the same one is not able to provide all services that you need.