下列说法正确的是( )。

A．行为包括积极的作为和消极的作为

B．要式的民事法律行为必须用书面形式作为其形式

C．法律意义上的行为指人的无意识的行为

D．行为人意思表示真实就是说行为人表现于外部的表示与其内在的真实意志相一致

Even though current technologies make the ultimate segmented network impractical, new technologies and products hold the promise of making the concept a reality. Most important of all these new technologies are (66) . The ultimate switched LAN, which is technically possible, now, exhibits the following characteristics:

1. High-speed yet cost-effective switching devices can be implemented on a wide scale, providing dedicated connections for individual users and supporting the aggregate (67) of all networked users.

2. The ability to deploy switching capabilities incrementally into the (68) base. Switching implementations support switching of individual users or groups so that existing users of shared media modules can continue to use the existing equipment until they can justify moving to dedicate switched LAN connections.

3. Support and enhancement of existing routed environments. Switching (69) routint, but rather can be introduced into the network without making any changes to the existing routing equipment or configuration. (70) play a critical role in the integration of switching into existing networks.

（68）（）

A.Routers

B.Devices

C.I/O

D.DSP