An SRV record, which is short for Service record, is a DNS entry employed to define the servers which run a particular service for a domain. Basically, you can use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for example, while you still have an Internet site with it. When you set up the SRV record, you can select what IP it'll employ, on which port the connection to the specific server is going to be established plus the priority and the weight of the record assuming that you have a number of SRV records for the very same service. The second option allows you to employ different machines for load balancing and redundancy. Using this type of DNS records, you can use the same domain for various purposes and even with different companies in case the same one can't provide all services you need.