Was ist der Unterschied zwischen ROLE_USER und ROLE_ANONYMOUS im Frühjahr intercept-url-Konfiguration?

Was ist der Unterschied zwischen ROLE_USER und ROLE_ANONYMOUS im Frühjahr intercept-url-Konfiguration wie im Beispiel unten?

<http auto-config="false" access-decision-manager-ref="accessDecisionManager"
    use-expressions="true">
    <intercept-url pattern="/admin/**" access="hasRole('ROLE_ANONYMOUS')"
        requires-channel="http" />
    <intercept-url pattern="/login/**" access="hasRole('ROLE_ANONYMOUS')"
        requires-channel="${application.secureChannel}" />
    <intercept-url pattern="/error/**" access="hasRole('ROLE_ANONYMOUS')"
        requires-channel="http" />
    <intercept-url pattern="/register/**" access="hasRole('ROLE_ANONYMOUS')"
        requires-channel="${application.secureChannel}" />
    <intercept-url pattern="/" access="hasRole('ROLE_ANONYMOUS')"
        requires-channel="http" />
    <intercept-url pattern="/**" access="hasRole('ROLE_USER')"
        requires-channel="http" />
    <form-login login-page="/login" login-processing-url="/login/submit"
        authentication-failure-url="/login/error" />
    <logout logout-url="/logout" />
</http>