An SRV record, which signifies Service record, is a DNS entry that is used to define the servers that run a certain service for a domain. Basically, you can use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for example, while you still have an Internet site with it. When you create the SRV record, you can choose 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 you have several SRV records for the exact same service. The second option will allow you to employ different machines for load balancing and redundancy. Using this kind of DNS records, you may use the same domain for a number of purposes and even with different providers if the same one is unable to provide all services that you need.