An SRV record, which means Service record, is a DNS entry which is used to outline the servers which run a certain service for a domain. Basically, you’ll be able to use your domain name not just for an Internet site, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, as an example, while you still have a site with it. When you create the SRV record, you can pick 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 assuming that there are several SRV records for the very same service. The second option will allow you to use different machines for load balancing and redundancy. With this type of DNS records, you may use the same domain for a number of purposes and even with different companies in case the same one can't provide all services that you need.