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