When setting up high availability settings for the web server, the custom properties should be configured at the cell level. The cell represents the highest level in the administrative hierarchy, encompassing all nodes and servers within the environment. Configuring high availability at the cell level ensures that the settings are applied globally, providing a unified approach to manage the redundancy and failover capabilities across the entire deployment.

A Java client can directly access EJBs running on an application server through the RMI/IIOP protocol. RMI (Remote Method Invocation) allows Java clients to invoke methods on remote objects, and IIOP (Internet Inter-ORB Protocol) is used for communicating with CORBA-compliant servers, which is typically required for EJBs. JDBC, SOAP/JMS, and SOAP/HTTP are protocols used for different types of communication and don't provide the direct access required for EJBs.