The Network Core ☒无法显示该图片， 口meSh(网眼、编织)of interconnected routers 口the fundamental(基本的) question:how is data transferred through net? ÷circuit switching: dedicated circuit per call:telephone net packet-switching:data sent thru net in discrete(离散的) “chunks" Introduction 1-16Introduction 1-16 The Network Core ❑ mesh（网眼、编织） of interconnected routers ❑ the fundamental （基本的） question: how is data transferred through net? ❖ circuit switching: dedicated circuit per call: telephone net ❖ packet-switching: data sent thru net in discrete（离散的） “chunks