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