Through what protocol can a Java client directly access EJBs running on an application server?

A.
JDBC

B.
RMI/IIOP

C.
SOAP/JMS

D.
SOAP/HTTP

Explanation:
Provided that it uses the correct protocols (SOAP, HTTP, WSDL), any web service client can access a
stateless session bean, whether or not the client is written in the Java programming language. The client
doesn’t even “know” what technology implements the service: stateless session bean, JAX-WS, or some other
technology. In addition, enterprise beans and web components can be clients of web services. This flexibility
enables you to integrate Java EE applications with web services.
http://docs.oracle.com/javaee/6/tutorial/doc/gipjf.html