SRV
A Service Record (SRV record) is a specification of data in the Domain Name System containing information about IP and port for a specific service.
It is used by domain servers to keep track of their own changes without having to contact a central DNS server.
An SRV record has the form:
_Service._Proto.Name TTL Class SRV Priority Weight Port Target
| Item | Description |
|---|---|
| Service | Identifier for the service. |
| Proto | The service protocol. |
| Name | Domain name where the record is valid. |
| TTL | DNS time to live. |
| Class | DNS class (IN for Internet). |
| Priority | Target host priority, lower value means more preferred. |
| Weight | A relative weight for records with the same priority. |
| Port | Port for the service. |
| Target | Hostname for the service provider. |