Name
SRV (service location) —
Textual representation:
owner ttl class
SRVpriority weight port target
Example:
_http._tcp.movie.edu. IN SRV 1 2 80 www.fx.movie.edu. IN SRV 1 1 8080 www1.fx.movie.edu.
Binary representation:
SRV type code: 33 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | PRIORITY | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | WEIGHT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ | PORT | +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ / TARGET / / / +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
where:
- PRIORITY
As for MX, the priority of this target host. A client MUST attempt to contact the target host with the lowest-numbered priority it can reach; target hosts with the same priority SHOULD be tried in pseudorandom order. The range is 0-65535.
- WEIGHT
Load balancing mechanism. When selecting a target host among those that have the same priority, the chance of trying this one first SHOULD be proportional to its weight. The range of this number is 1-65535. Domain administrators are urged to use Weight 0 when there isn’t any load balancing to do, to make the RR easier to read for humans (less noisy).
- PORT
The port on this target host of this service. The range is 0-65535. This is often as specified in Assigned Numbers but need not be.
- TARGET
As for MX, the domain name of the target host. There MUST be one or more A records for this name. Implementors are urged, but not required, to return the A record(s) in the Additional Data section. Name compression ...
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