SRV, which is an abbreviation for Service, is a DNS record, which permits you to employ a domain for a particular service different from an Internet site. By setting up a number of SRV records, you’ll be able to use the domain name with different providers and direct it to several servers at the same time, each server handling a different service. You could specify the port number for the connection to each machine, so there will not be any interference. You can even set different priorities and weight for two records which are used for the very same service, but forward to different servers for redundancy or load balancing. With an SRV record you can use your domain name or a subdomain under it for a Voice-Over-IP server, for example, and have the real software running on several machines with different providers. Which one a customer of yours will use is determined by the priority and weight values that you have set.