计算机局域网的英文缩写简称A` WAN B`MAN C` LAN D` SAN

WAN = wide area network,广域网
man = Maintenance Alert Network,维护警报网;
= MAN-machine system,人机系统;
= metropolitan area network,城域网
lan = local area network,局域网,局部区域网,局域网路
san = Severe Acoustic Noise,严重音响噪声
所以是lan