EJB
sThe J2EE security model lets you configure a Web
component or
enterprise bean so that system resources are accessed only by
authorized users.
s The J2EE transaction model lets you specify
relationships among
s methods
that make up a single transaction so that all methods in one
transaction are treated as a single unit.
JNDI lookup services provide a unified interface to
multiple naming
s and
directory services in the enterprise so that application
s
components can access naming and directory services.
The J2EE remote connectivity model manages
low-level
communications between clients and enterprise beans. After an
s
enterprise bean is created, a client invokes methods on it as if it
were
s in the
same virtual machine.