SRV, which is an abbreviation for Service, is a DNS record, which allows you to use a domain name for a specific service different from an Internet site. By setting up a number of SRV records, you are able to use the domain name with different companies and forward it to a number of servers simultaneously, each and every server managing a separate service. You could 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 2 records that are employed for the very same service, but point 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 real software running on various machines with different companies. Which one a customer of yours will use is determined by the priority and weight values you have set.