SRV, which is an abbreviation for Service, is a DNS record, which permits you to employ a domain for a certain service different from a site. By setting up a few SRV records, you’ll be able to use the domain with different providers and point it to many servers at the same time, each and every server managing a different service. You are able to specify the port number for the connection to every single machine, so there will never be any interference. You may as well set different priorities and weight for 2 records which are employed for the exact same service, but direct to different servers for redundancy or load balancing. Using 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 actual software running on a number of machines with different companies. Which one a customer of yours will use will depend on the priority and weight values which you have set.