An SRV record, which stands for Service record, is a DNS entry which is used to outline the servers which run a specific service for a domain. Quite simply, you can use your domain not just for a site, but also for an instant messaging server, a video streaming host or perhaps a Voice-Over-IP server, for instance, while you still have a site with it. If you set up the SRV record, you can pick what IP it's going to use, on which port the connection to the particular server is going to be established along with the priority and the weight of the record in case that you have several SRV records for the exact same service. The second option will allow you to employ different machines for load balancing and redundancy. Using this type of DNS records, you may use the same domain name for various purposes and even with different companies if the same one is not able to provide all services you need.