內聯網係一種組織內部嘅區域性網絡。佢只可以喺一定網絡範圍內連線，無得上互聯網（外聯網）。獨立於萬維網。
一般用家要自己搞內聯網就要有上網機器兩部，兼夾路由器。將路由器個LAN頭連落個LAN頭就可以整到個內聯網。如果個LAN頭連落個WAN頭就係連出互聯網，又叫「出街」。
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