An SRV record, which means Service record, is a DNS entry that is used to define the servers that run a specific service for a domain name. Quite simply, you can use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or even a Voice-Over-IP server, as an example, while you still have a site with it. Whenever you create the SRV record, you can select what Internet Protocol it'll use, on which port the connection to the particular server will be established as well as the priority and the weight of the record provided that you have several SRV records for the very same service. The latter option will enable you to use different machines for load balancing and redundancy. With this kind of DNS records, you can use the same domain name for a number of purposes and even with different providers if the same one can't provide all services you require.