An SRV record, which signifies Service record, is a DNS entry that is used to define the servers that run a particular service for a domain. Basically, you can use your domain 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 set up the SRV record, you can select what IP it'll 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 provided that you have several SRV records for the exact same service. The second option will permit you to employ different machines for load balancing and redundancy. Using this kind of DNS records, you may use the same domain address for a variety of purposes and even with different companies in case the same one cannot provide all services you need.