广城网可以提供面向连接和无连接两种服务模式，对应于两种服务模式,广城网有虚电路和数据报两种传输方式，以下关于虚电路和数据报的叙述中，正确的是()
正确答案及解析
正确答案
解析
都正确。A选项正确，虚电路标识符(VCI)是虚电路的唯一标识连接，分组首部包含的是VCI，数据报方式中，每个分组的首部都携带完整的源、目的地址；B选项正确，数据报方式在网络中不存储状态信息，虚电路需要占用表空间；C、D选项正确，数据报方式的每个分组都独立处理，转发的路径有可能不同，因此也不一定按顺序到达接受方，虚电路建好后，分组的转发路径是相同的，所以是按序到达对方。
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