An SRV record, which signifies Service record, is a DNS entry that is used to identify the servers which run a specific service for a domain name. In other words, you can use your domain not only for an Internet site, but also for an instant messaging server, a video streaming host or even a Voice-Over-IP server, as an example, while you still have an Internet site with it. Whenever you set up the SRV record, you can choose what Internet Protocol it'll use, on which port the connection to the specific server will be established in addition to the priority and the weight of the record in case that you have a number of SRV records for the exact same service. The second option will enable you to use different machines for load balancing and redundancy. Using this kind of DNS records, you can use the same domain name for a variety of purposes and even with different providers if the same one cannot provide all services you need.