SRV, which is an abbreviation for Service, is a DNS record, which enables you to employ a domain for a certain service different from an Internet site. By setting up a couple of SRV records, you’ll be able to use the domain name with different companies and direct it to numerous servers at a time, each and every server managing a separate service. You'll be able to specify the port number for the connection to every single machine, so there will not be any interference. You could also set individual priorities and weight for 2 records which are employed for the same service, but point to different servers for redundancy or load balancing. With an SRV record you can use your domain name 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 providers. Which one a customer of yours will use will depend on the priority and weight values which you have set.