The semantics of the three elements of network protocol stipulate（）
A. What should communication parties “say” when communicating
B. “How to say” in communication
C. Structure or format of data and control information
D. Execution sequence of communication events
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IP protocol is located in（）of the TCP/IP architecture
A. Interconnection Network Layer
B. Application Layer
C. Transport Layer
D. Network access Layer
The syntax of the three elements of network protocol stipulates that（）
A. “How to say” in communication
B. Explanation of contents to be expressed by both parties in communication
C. What should communication parties “say” when communicating
D. Execution sequence of communication events
Among the following options, which one is not described in the network architecture.（）
A. Details of internal protocol implementation
B. Network level
C. Usage protocol of each layer
D. Functions to be completed for each layer
In the OSI reference model, the main function of the Physical Layer is（）
A. Transparently transmitting bit streams
B. Access control and management of data link
C. Transferring data frames between physical entities
D. Transferring data frames between physical entities
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