An SRV record, which is short for Service record, is a DNS entry that is used to identify the servers which run a particular service for a domain. Put simply, you’re able to use your domain name not only for a website, but also for an instant messaging server, a video streaming host or a Voice-Over-IP server, for instance, while you still have a website with it. Whenever you create the SRV record, you can pick what Internet Protocol it'll 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 exact same service. The second option allows you to employ different machines for load balancing and redundancy. With this type of DNS records, you can use the same domain for various purposes and even with different companies if the same one can't provide all services you require.