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 couple of SRV records, you’ll be able to use the domain with different providers and direct it to many servers at the same time, each server managing a different service. You are able to specify the port number for the connection to each and every machine, so there will never be any interference. You can even set different priorities and weight for two records that are used for the very same service, but direct to different servers for redundancy or load balancing. Using an SRV record you can employ your domain or a subdomain under it for a Voice-Over-IP server, for instance, and have the specific software running on several machines with different providers. Which one a client of yours is going to use depends on the priority and weight values that you have set.