[Knowledge]集線器(Hub)、交換器(Switch)、IP分享器、路由器(Router)的差別

http://bluemuta38.pixnet.net/blog/post/45543357-%E9%9B%86%E7%B7%9A%E5%99%A8(hub)%E3%80%81%E4%BA%A4%E6%8F%9B%E5%99%A8(switch)%E3%80%81ip%E5%88%86%E4%BA%AB%E5%99%A8%E3%80%81%E8%B7%AF%E7%94%B1%E5%99%A8