SRV, which is an abbreviation for Service, is a DNS record, which permits you to employ a domain name for a specific service different from an Internet site. By setting up a few SRV records, you will be able to use the domain name with different providers and forward it to numerous servers at once, each and every server managing a different service. You are able to specify the port number for the connection to each machine, so there won't be any interference. You may as well 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. By having 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 several machines with different companies. Which one a client of yours is going to use is determined by the priority and weight values that you have set.