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 a website. By setting up a couple of SRV records, you’ll be able to use the domain with different companies and point it to a number of servers at once, each and every server handling a different service. You are able to specify the port number for the connection to every machine, so there will not be any interference. You can even set individual priorities and weight for 2 records that are employed for the very same service, but direct to different servers for redundancy or load balancing. Using an SRV record you can use your domain address or a subdomain under it for a Voice-Over-IP server, for instance, and have the real software running on several machines with different companies. Which one a customer of yours is going to use is determined by the priority and weight values which you have set.