SRV, which is an abbreviation for Service, is a DNS record, which enables you to use a domain for a specific service different from an Internet site. By setting up a number of SRV records, you’re able to use the domain address with different companies and direct it to many servers simultaneously, each and every server managing a different service. You are able to specify the port number for the connection to each and every machine, so there will not be any interference. You may as well set different priorities and weight for two records that are used for the exact same service, but point to different servers for redundancy or load balancing. By having an SRV record you can use your domain address or a subdomain under it for a Voice-Over-IP server, for instance, and have the actual software running on a number of machines with different providers. Which one a client of yours is going to use depends on the priority and weight values which you have set.