An SRV record, which is short for Service record, is a DNS entry which is used to define the servers that run a certain service for a domain. Basically, you will be able to use your domain not only for a website, 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 a website with it. Whenever you create the SRV record, you may choose what Internet Protocol 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 provided that there are several SRV records for the very same service. The second option will enable you to employ different machines for load balancing and redundancy. With this kind of DNS records, you may use the same domain for a variety of purposes and even with different companies in case the same one can't provide all services you require.