An SRV record, which is short for Service record, is a DNS entry that is used to identify the servers that run a specific service for a domain. Basically, you are able to use your domain name not only for a site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for instance, while you still have a website with it. When you create the SRV record, you can choose what IP it's going to use, on which port the connection to the specific server is going to be established in addition to the priority and the weight of the record provided that there are several SRV records for the exact same service. The latter option will allow you to employ different machines for load balancing and redundancy. With this type of DNS records, you could use the same domain address many different purposes and even with different companies if the same one can't provide all services that you need.