问题
单项选择题
A (72) is a data communication system that allows a number of independent devices to communications directly with each other in a limited geographic are
A．A. LANB. WANC. InternetD. Ethernet
答案
参考答案：A
解析：[分析]
局域网是一个数字通信系统，允许一定数量的独立设备在有限的区域内能够彼此直接通信。