第8講數(shù)據(jù)鏈路層(3)

1、劉宏劉宏月印月印2022-6-8College of Information Science and Technology, HAUT3/302022-6-8College of Information Science and Technology, HAUT4/302022-6-8College of Information Science and Technology, HAUT5/302022-6-8College of Information Science and Technology, HAUT6/30以太網(wǎng)以太網(wǎng)集線器集線器光纖光纖光纖調(diào)制解調(diào)器調(diào)制解調(diào)器光纖光纖調(diào)制解調(diào)器調(diào)制解

2、調(diào)器2022-6-8College of Information Science and Technology, HAUT7/302022-6-8College of Information Science and Technology, HAUT8/30250m750m500m500m500m50m50m50m網(wǎng)段網(wǎng)段1repeater網(wǎng)網(wǎng)段段2網(wǎng)網(wǎng)段段3repeaterrepeaterrepeater2022-6-8College of Information Science and Technology, HAUT9/30學(xué)院學(xué)院A學(xué)院學(xué)院C學(xué)院學(xué)院B主干集線器主干集線器碰撞域碰撞域20

3、22-6-8College of Information Science and Technology, HAUT10/30集集線線器器網(wǎng)卡網(wǎng)卡工作站工作站網(wǎng)卡網(wǎng)卡工作站工作站網(wǎng)卡網(wǎng)卡工作站工作站雙絞線雙絞線2022-6-8College of Information Science and Technology, HAUT11/302022-6-8College of Information Science and Technology, HAUT12/302022-6-8College of Information Science and Technology, HAUT13/30網(wǎng)段網(wǎng)段

4、 B網(wǎng)段網(wǎng)段 A網(wǎng)橋12站表站表接口管理接口管理 軟件軟件網(wǎng)橋協(xié)議網(wǎng)橋協(xié)議 實體實體緩存緩存接口接口 1接口接口 2111222站地址站地址 接口接口網(wǎng)橋網(wǎng)橋接口接口1接口接口22022-6-8College of Information Science and Technology, HAUT14/302022-6-8College of Information Science and Technology, HAUT15/30B2B1碰撞域碰撞域碰撞域碰撞域碰撞域碰撞域ABCDEF2022-6-8College of Information Science and Technology,

5、HAUT16/30一系一系三系三系二系二系10BASE-T至因特網(wǎng)至因特網(wǎng)100Mb/s100Mb/s100Mb/s萬維網(wǎng)萬維網(wǎng)服務(wù)器服務(wù)器電子郵件電子郵件 服務(wù)器服務(wù)器以太網(wǎng)以太網(wǎng)交換機交換機路由器路由器2022-6-8College of Information Science and Technology, HAUT17/302022-6-8College of Information Science and Technology, HAUT18/30地址地址 接口接口地址地址 接口接口B 1B AA DA 1A DA 1F CF 2F CF 2B1ABCDEF1212B22022-6-

6、8College of Information Science and Technology, HAUT19/302022-6-8College of Information Science and Technology, HAUT20/302022-6-8College of Information Science and Technology, HAUT21/30地址地址 接口接口B1ABCDEF1212地址地址 接口接口B 1A 1A 1F 2F 2B22022-6-8College of Information Science and Technology, HAUT22/30局域網(wǎng)局

7、域網(wǎng)2局域網(wǎng)局域網(wǎng)1 AF不停地兜圈子不停地兜圈子A發(fā)出的幀發(fā)出的幀F(xiàn)1交換機交換機1轉(zhuǎn)發(fā)的幀轉(zhuǎn)發(fā)的幀F(xiàn)2交換機交換機2轉(zhuǎn)發(fā)的幀轉(zhuǎn)發(fā)的幀網(wǎng)絡(luò)資源白白消耗了網(wǎng)絡(luò)資源白白消耗了交換機交換機1交換機交換機22022-6-8College of Information Science and Technology, HAUT23/302022-6-8College of Information Science and Technology, HAUT24/302022-6-8College of Information Science and Technology, HAUT25/302022-6-8College of Information Science and Technology, HAUT26/302022-6-8College of Information Science and Technology, HAUT27/302022-6-8College of Information Science and Technology, HAUT28/30一系一系三系三系二系二系10BASE-T至因特網(wǎng)至因特網(wǎng)100Mb/s100Mb/s100Mb/s萬維網(wǎng)萬維網(wǎng)服務(wù)器服務(wù)器電子郵件電子郵件 服務(wù)器服務(wù)器以太網(wǎng)以太網(wǎng)交換機交換機路由器路由器2022-6