SRV, which is an abbreviation for Service, is a DNS record, which permits you to use a domain for a specific service different from an Internet site. By creating a few SRV records, you’re able to use the domain with different companies and forward it to a number of servers at once, each and every server handling a different service. You'll be able to specify the port number for the connection to each and every machine, so there won't be any interference. You can even set individual priorities and weight for 2 records which are employed for the very 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 real software running on various machines with different providers. Which one a client of yours is going to use is determined by the priority and weight values that you've set.