计算机网络专业英语 课件 L1-2 Text 2 Physical and Logical Layout of Computer Networks.pptx
L1-2
Lesson1OverviewofComputerNetworks
Text2PhysicalandLogicalLayoutofComputerNetworks
要点KeyPoints:词汇:设计逻辑的和物理的如何表示“频度”词汇:线、路径、通道如何解释和描述事物词汇:拓扑、布局
Anetworkcanbedesignedbydifferentlayoutsknownastopologies.Physicaltopologyisthephysicallayoutofthenetwork,whichdefineshowthecablesarearrangedandhowthecomputersareconnected.Logicaltopologyreferstothenatureofthepathsthesignalsfollowfromnodetonode.Inmanyinstances,thelogicaltopologyisthesameasthephysicaltopology.Butthisisnotalwaysthecase.Thecommontopologiesincludebus,star,tree,mesh,hybridandring,asshowninFigure1-1.设计designdevise
物理的和逻辑的physics/physical和logic/logicalAnetworkcanbedesignedbydifferentlayoutsknownastopologies.Physicaltopologyisthephysicallayoutofthenetwork,whichdefineshowthecablesarearrangedandhowthecomputersareconnected.Logicaltopologyreferstothenatureofthepathsthesignalsfollowfromnodetonode.Inmanyinstances,thelogicaltopologyisthesameasthephysicaltopology.Butthisisnotalwaysthecase.Thecommontopologiesincludebus,star,tree,mesh,hybridandring,asshowninFigure1-1.
如何表示“频度”Anetworkcanbedesignedbydifferentlayoutsknownastopologies.Physicaltopologyisthephysicallayoutofthenetwork,whichdefineshowthecablesarearrangedandhowthecomputersareconnected.Logicaltopologyreferstothenatureofthepathsthesignalsfollowfromnodetonode.Inmanyinstances,thelogicaltopologyisthesameasthephysicaltopology.Butthisisnotalwaysthecase.Thecommontopologiesincludebus,star,tree,mesh,hybridandring,asshowninFigure1-1.common、usual、normal、regular、ordinary、general和generic共同的常见的通常的正常的定期的经常的普通的平常的一般的通常的reg-统治,规则词根ordin表“秩序”词根gen,生育,词源同generate.即同种类的
线、路径、通道path、cable、wire、cord、line、channel、backbone和trunkAnetworkcanbedesignedbydifferentlayoutsknownastopologies.Physic