英文版课件蒋ch4-mac.pptx

4 The Medium Access Control Sublayer ;The Medium Access Control Sublayer;4.1 The Channel Allocation Problem ;M/M/1 System;M/M/1 System;M/M/1 Example;The Channel Allocation Problem;Static Channel Allocation ;Static Channel Allocation;Static Channel Allocation(2);Dynamic Channel Allocation;Classification of Dynamic Channel Allocation;Five Key Assumptions of Dynamic Channel Allocation;Station Model;Single Channel Assumption;Collision Assumption;Continuous Time Slotted Time.;Carrier Sense;4.2 Multiple Access Protocols;Multiple Access Protocols;ALOHA;Pure ALOHA;Pure ALOHA: Collision Demo;Pure ALOHA: Performance Analysis(1);Pure ALOHA: Performance Analysis(2);Pure ALOHA: Performance Analysis(3);Slotted ALOHA ;Slotted ALOHA(2);ALOHA Summary;Expected number of transmissions;Carrier Sense Multiple Access Protocols (CSMA);CSMA protocols;CSMA Comparison;Persistent and Nonpersistent CSMA;CSMA Collision Reasons;CSMA with Collision Detection;Collision Detection;Collision-Free Protocols ;Basic Bit-map Protocol;Bit-map Protocol: Performance;Binary Countdown Protocol;Binary Countdown protocol; Limited-Contention Protocols;Limited-Contention Protocols;Performance of Symmetric Contention;Performance of Symmetric Contention;Limited-Contention Protocols;Adaptive Tree Walk Protocol;Adaptive Tree Walk Protocol;Improvements to Adaptive Tree Walk Protocol; Wireless LAN Protocols;Problems;Solutions;MACA: Collision Avoidance;MACA: Collisions;4.3 Ethernet;Bob Metcalfe’s Vision;Early History;Ethernet; Ethernet Cabling;Ethernet Cabling;Ethernet Cabling:AUI,BNC,UTP5;10Base5: Thick Ethernet(1) ;10Base5: Thick Ethernet(2) ;10Base2: Thin Ethernet ;10BaseT;Repeater;Ethernet Topologies;Using Hubs to Enlarge a LAN;Manchester Encoding;Manchester Encoding;Ethernet MAC Sublayer Protocol;Ethernet MAC Sublayer Protocol;IEEE 802 Address;Frame length ;Binary Exponential Backoff Algorithm ;IEEE 802.3 Performance;Ethernet Performance;Fast Ethernet;802.3u: A Soaped-up Ethernet;Fast Ethernet;Fast Ethernet cablin