Message Transmission & Optimization Mechanism

See Also 

The MTOM section of the Web Service Attributes editor is part of the message optimization features provided by the Web Services Interoperability Technology (WSIT).

When you expand the MTOM section, you can select the MTOM checkbox. The MTOM feature is disabled in JAX-WS by default. It can be enabled on the client and server. Once enabled all the XML binary data, XML elements of type xs:base64Binary and xs:hexBianry is optimally transmitted. Currently MTOM works only with proxy port.

See Also
About Advanced Web Service Features
When Should Message Optimization be Used?

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