SRV, which is an abbreviation for Service, is a DNS record, which allows you to employ a domain name for a particular service different from an Internet site. By creating a few SRV records, you’re able to use the domain address with different providers and forward it to many servers at the same time, each server managing a separate service. You could specify the port number for the connection to each and every machine, so there will not be any interference. You may as well set individual priorities and weight for 2 records which are used for the same service, but direct to different servers for redundancy or load balancing. Using an SRV record you can employ your domain address or a subdomain under it for a Voice-Over-IP server, for example, and have the actual software running on various machines with different companies. Which one a customer of yours is going to use depends on the priority and weight values which you have set.