SRV, which is an abbreviation for Service, is a DNS record, which allows you to employ a domain for a certain service different from an Internet site. By setting up a number of SRV records, you’ll be able to use the domain address with different providers and direct it to several servers at once, each and every server managing a separate service. You'll be able to specify the port number for the connection to each and every machine, so there will never be any interference. You may as well set individual priorities and weight for 2 records which are employed for the exact same service, but point to different servers for redundancy or load balancing. With an SRV record you can employ your domain name or a subdomain under it for a Voice-Over-IP server, for instance, and have the specific software running on several machines with different companies. Which one a customer of yours will use depends on the priority and weight values that you have set.