| Interface | Description | 
|---|---|
| DnsClient | 
 Provides a way to asynchronously lookup information from DNS servers. 
 | 
| MxRecord | 
 Represent a Mail-Exchange-Record (MX) which was resolved for a domain. 
 | 
| SrvRecord | 
 Represent a Service-Record (SRV) which was resolved for a domain. 
 | 
| Class | Description | 
|---|---|
| AddressResolverOptions | 
 Configuration options for Vert.x hostname resolver. 
 | 
| DnsClientOptions | 
 Configuration options for Vert.x DNS client. 
 | 
| DnsClientOptionsConverter | 
 Converter for  
DnsClientOptions. | 
| DnsException | 
 Exception which is used to notify the  
AsyncResult
 if the DNS query returns a DnsResponseCode which indicates and error. | 
| Enum | Description | 
|---|---|
| DnsResponseCode | 
 Represents the possible response codes a server may send after receiving a
 query. 
 | 
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