An SRV record, which signifies Service record, is a DNS entry which is used to define the servers which run a certain service for a domain. Quite simply, you can use your Internet domain not only 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 an Internet site with it. Whenever you create the SRV record, you can choose what Internet Protocol it'll use, on which port the connection to the specific server is going to be established in addition to the priority and the weight of the record assuming that you have a number of SRV records for the very same service. The latter option will enable you to employ different machines for load balancing and redundancy. With this type of DNS records, you could use the same domain for a variety of purposes and even with different companies in case the same one can't provide all services that you need.