说明：  MCSE Training Guide: Networking Essentials, Second Edition is designed for advanced end-users, service technicians, and network administrators with the goal of certification as a Microsoft Certified Systems Engineer (MCSE). The “Networking Essentials” exam (70-058) measures your ability to implement, administer, and troubleshoot information systems that incorporate Windows 95 as well as any of the BackOffice family of products. According to Microsoft, the exam covers only the networking knowledge and skills common to both Windows 95 and BackOffice products.