An SRV record, which is short for Service record, is a DNS entry which is used to identify the servers which run a particular service for a domain name. In other words, you are able to use your domain name not only for a site, but also for an instant messaging server, a video streaming host or perhaps a Voice-Over-IP server, for instance, while you still have a website with it. When you set up the SRV record, you can select what IP it is going to use, on which port the connection to the particular server is going to be established in addition to the priority and the weight of the record in case that you have several SRV records for the exact same service. The second option allows you to use different machines for load balancing and redundancy. With this kind of DNS records, you could use the same domain name for a number of purposes and even with different companies in case the same one is unable to provide all services you require.