An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include(1), we can distribut data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and (2). The first physical DFD to be drawn is the (3). The next step is to distribute data stores to different processors. Data (4) are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of (5), we should record each table as a data store on the physical DFD and connect each to the appropriate server.

空白（1）处应选择（）

A.logical DFDs and ERD

B.ideal object model and analysis class model

C.use case models and interface prototypes

D.physical DFDs and database schema

简述载波侦听多路访问/冲突检测的工作原理。