SRV, which is an abbreviation for Service, is a DNS record, which enables you to use a domain name for a specific service different from an Internet site. By setting up a few SRV records, you will be able to use the domain name with different providers and direct it to several servers simultaneously, each and every server handling a different service. You are able to specify the port number for the connection to every single machine, so there won't be any interference. You may as well set individual priorities and weight for 2 records that are employed for the very same service, but forward 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 example, and have the real software running on several machines with different providers. Which one a customer of yours will use depends on the priority and weight values you have set.