SRV, which is an abbreviation for Service, is a DNS record, which allows you to employ a domain name for a specific service different from an Internet site. By setting up a few SRV records, you’ll be able to use the domain name with different companies and point it to several servers at a time, every single server managing a different service. You can specify the port number for the connection to every machine, so there will not be any interference. You can also set individual priorities and weight for two records that are employed for the very same service, but forward 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 example, and have the real software running on several machines with different providers. Which one a customer of yours is going to use is determined by the priority and weight values that you have set.