SRV, which is an abbreviation for Service, is a DNS record, which enables you to employ a domain for a certain service different from an Internet site. By creating a couple of SRV records, you are able to use the domain with different providers and forward it to numerous servers at once, each and every server managing a separate service. You are able to specify the port number for the connection to every single machine, so there won't be any interference. You can even set individual priorities and weight for two records which are employed 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 specific software running on various machines with different companies. Which one a client of yours will use is determined by the priority and weight values you have set.