Does jaxws 2.0 use JAXB for java object serialization?

[tom chansky]

I use the jaxws2.0 wsimport to generate a ws client.

So, When a ws client passes a pojo to a ws provider, does the ws client internally serialize the pojo using JAXB to marshall that object to xml before sending it to the ws provider?

If that's the case, does the provider use JAXB to unmarshall the xml back to a pojo?