SRV, which is an abbreviation for Service, is a DNS record, which enables you to employ a domain name for a specific service different from an Internet site. By creating a couple of SRV records, you can use the domain address with different companies and forward it to numerous servers at once, each server managing a different service. You are able to specify the port number for the connection to each and every machine, so there won't be any interference. You may as well set individual priorities and weight for 2 records that are used for the very same service, but direct to different servers for redundancy or load balancing. Using an SRV record you can employ your domain address or a subdomain under it for a Voice-Over-IP server, for instance, and have the specific software running on several machines with different providers. Which one a customer of yours is going to use will depend on the priority and weight values that you have set.