单选题 A local area network (LAN) is the communication of a number of computers by (68) connecting to each one in a single location, usually a single floor of a building or all the computers in a small company.

【正确答案】 B
【答案解析】[分析] 一个局域网(LAN)实现在某个单一区域中(通常是某个建筑物中的一层或者是一家小型公司的全部计算机)，通过电缆彼此连接的多台计算机之间的数据通信。