SRV, which is an abbreviation for Service, is a DNS record, which permits you to use a domain for a specific service different from a website. By setting up a few SRV records, you’re able to use the domain with different providers and direct it to a number of servers at once, each server handling 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 can also set different priorities and weight for two records that are employed for the exact same service, but point to different servers for redundancy or load balancing. With an SRV record you can use your domain address 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 client of yours will use is determined by the priority and weight values you have set.