The packet filter rout provide the same functionality as the packet filter firewall describe in section2.1.1.
包过滤路由器与包过滤防火墙具有同一功能，如2。1。1部分所述。
Refer to netmeeting online help for using other netmeeting functionality.
使用NetMeeting其它功能，请参阅NetMeeting联机帮助。
functionality详细解释
func.tion.al.i.ty n.（名词）The quality of being functional.功能性：起作用、运转的特性A useful function within a computer application or program.计算机应用程序或程序内有效的功能The capacity of a computer program or application to provide a useful function.计算机程序的容量或只能提供功能的应用程序
