SRV, which is an abbreviation for Service, is a DNS record, which enables you to employ a domain name for a particular service different from an Internet site. By setting up a number of SRV records, you can use the domain with different providers and direct it to several servers simultaneously, 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 could also set individual priorities and weight for two records which are employed for the very same service, but forward to different servers for redundancy or load balancing. Using an SRV record you can employ your domain name or a subdomain under it for a Voice-Over-IP server, for example, and have the specific software running on various machines with different providers. Which one a customer of yours will use will depend on the priority and weight values that you have set.