An SRV record, which signifies Service record, is a DNS entry that is used to identify the servers that run a specific service for a domain. Basically, you are able to use your Internet domain not only for a 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. If you set up the SRV record, you can choose what Internet Protocol it's going to employ, on which port the connection to the specific server will be established as well as the priority and the weight of the record assuming that there are several SRV records for the exact same service. The latter option allows you to use different machines for load balancing and redundancy. Using this kind of DNS records, you can 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 require.