An SRV record, which is short for Service record, is a DNS entry which is used to define the servers that run a specific service for a domain name. Basically, you are able to use your domain name not only for a web 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. Whenever you set up the SRV record, you may choose what IP it's going to use, on which port the connection to the particular server will be established in addition to the priority and the weight of the record in case that there are several SRV records for the very same service. The second option allows you to employ different machines for load balancing and redundancy. With this kind of DNS records, you may use the same domain name for various purposes and even with different companies in case the same one is unable to provide all services you need.