SRV, which is an abbreviation for Service, is a DNS record, which enables you to employ a domain for a specific service different from a website. By creating a number of SRV records, you can use the domain name with different companies and direct it to several servers simultaneously, each server handling a separate service. You'll be able to specify the port number for the connection to each machine, so there won't be any interference. You can also set individual priorities and weight for 2 records that are used for the exact same service, but forward 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 actual software running on various machines with different companies. Which one a client of yours will use depends on the priority and weight values you have set.
