SRV, which is an abbreviation for Service, is a DNS record, which permits you to employ a domain for a certain service different from a site. By creating a number of SRV records, you’ll be able to use the domain name with different companies and point it to numerous servers at the same time, each server managing a different service. You are able to specify the port number for the connection to every single machine, so there will never be any interference. You can even set individual priorities and weight for 2 records that are used for the very same service, but point to different servers for redundancy or load balancing. With an SRV record you can use your domain address or a subdomain under it for a Voice-Over-IP server, for example, and have the specific software running on several machines with different companies. Which one a customer of yours is going to use depends on the priority and weight values that you have set.