(For the well-known routing-level network firewall Microsoft? Internet Security and Acceleration Server2000 (hereinafter referred to as ISAServer2000) upgrade, Microsoft has released on July 13, 2004 Microsoft? Internet Security and Acceleration (ISA) Server2004 (hereinafter referred to as ISAServer2004). Compared with ISAServer2000, what new functions are there worth our expectation? This section specifically introduces the new features of ISAServer2004, and introduces the main functions newly added in ISAServer2004 with pictures and texts.)