局域网
局域网（local area network (LAN)）是一个可连接住宅，学校，实验室，大学校园或办公大楼等有限区域内计算机个计算机网络。相比起来，广域网（WAN）不仅覆盖较大个地理距离，而且还通常涉及固接專線搭对于互联网个链接。 相比来说互联网则更为广阔，是连接全球商业搭个人电脑的系统。
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