SRV, which is an abbreviation for Service, is a DNS record, which allows you to employ a domain name for a specific service different from an Internet site. By setting up a few SRV records, you’ll be able to use the domain with different providers and point it to numerous servers simultaneously, every single server handling a different service. You'll be able to specify the port number for the connection to each and every machine, so there will not be any interference. You can even set different priorities and weight for two records that are used for the same service, but point to different servers for redundancy or load balancing. With an SRV record you can use your domain address or a subdomain under it for a Voice-Over-IP server, for example, and have the specific software running on a number of machines with different companies. Which one a customer of yours will use is determined by the priority and weight values which you have set.