This figure describes the Portal and Wireless topology. The Portal and Wireless middle-tier installation type is installed in one Oracle Home. The Infrastructure is installed in a separate Oracle Home, and contains the Oracle Application Server Metadata Repository, which provides product metadata, security metadata, and management metadata. This Oracle Home also includes Identity Management services, including Oracle Internet Directory, Oracle Application Server Single Sign-On, Directory Integration and Provisioning, Delegated Administration Services, and Oracle Application Server Certificate Authority.