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计算机主机网关的作用是什么？假设你的名字叫小不点，你住在一个大院子里，你的邻居有很多小伙伴，在门口传达室还有个看大门的李大爷，李大爷就是你的网关-Mainframe computer What is the role of gateway? The assumption that your name does not叫小point, you live in a compound yard, your neighbors, there are many small partners, at the door there is a janitor
