An SRV record, which means Service record, is a DNS entry employed to define the servers which run a particular 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 example, while you still have a site with it. If you create the SRV record, you can choose what Internet Protocol it's going to use, on which port the connection to the specific server will be established in addition to the priority and the weight of the record in case that you have several SRV records for the very same service. The second option will enable you to employ different machines for load balancing and redundancy. Using this type of DNS records, you may use the same domain for a number of purposes and even with different providers in case the same one cannot provide all services you require.