【名词&注释】
源程序(source program)、可执行文件(executable file)、网络软件(network software)、文件扩展名(suffix name)、二进制代码、汇编程序(assembler)、文件类型(file type)
[单选题]Network software consists of( ),or rules by which processes can communicate.
A. protocols
B. programs
C. devices
D. computers