PPP协议 点到点协议 厦 Cisco.com 深圳职业技术学院计算机系网络专业
© 2006, Shenzhen Polytechnic. All rights reserved. 1 PPP协议 点到点协议 深圳职业技术学院计算机系网络专业
教学目标（Objectives) Cisco.com 1.PPP组成(PPP Components) 2.PPP会话建立（PPP Session Establishment) 3.PPP认证(PPP Authentication) 4.PAP和CHAP配置(Configure CHAP and PAP) 5.验证PPP(Verify PPP configuration) 2006,ShenzhenPolytechnic.Allrightsreserved
© 2006, Shenzhen Polytechnic. All rights reserved. 2 教学目标（ Objectives ） 1. PPP组成（PPP Components ） 2. PPP会话建立（ PPP Session Establishment ） 3. PPP认证（ PPP Authentication ） 4. PAP和CHAP配置（ Configure CHAP and PAP ） 5. 验证PPP（Verify PPP configuration）
广域网连接类型：第一层 (WAN Connection Types:Layer 1) 厦 Cisco.com 同步串行线路(Synchronous serial) 专线 之 Leased Line 异步串行线路 Asynchronous serial,ISDN Layer 1 二-Telephone) 电路交换 Company 天 Circuit-switched Synchronous serial 分组交换 Service Provider Packet-switched
© 2006, Shenzhen Polytechnic. All rights reserved. 3 专线 Leased Line 同步串行线路（Synchronous serial） Telephone 电路交换 Company Circuit-switched 异步串行线路 Asynchronous serial, ISDN Layer 1 Service Provider 分组交换 Packet-switched Synchronous serial 广域网连接类型：第一层 （WAN Connection Types: Layer 1）
串行线路点到点连接 (Serial Point-to-Point Connections) wwwwcmm Cisco.com Router connections Enduser ✉ device DTE CSU/ DCE DSU Service) Provider EIA/TIA-232 EIA/TIA-449 V.35 X.21 EIA-530 2006,ShenzhenPolytechnic.All rights reserved
© 2006, Shenzhen Polytechnic. All rights reserved. 4 串行线路点到点连接 （Serial Point-to-Point Connections） Router connections EIA/TIA-232 EIA/TIA-449 V.35 X.21 EIA-530 CSU/ DSU End user device Service Provider DTE DCE
第二层典型的广域网封装协议 (Typical WAN Encapsulation Protocols:Layer 2) mmm Cisco.com HDLC,PPP,SLIP 专线 (Leased Line) X.25,Frame Relay,ATM 包交换 Service Provider (Packet-switched) PPP,SLIP,HDLC 电路交换 三-Telephone Company Circuit-switched) 2006,Shenzhen Polytechnic.All rights reserved
© 2006, Shenzhen Polytechnic. All rights reserved. 5 专线 （Leased Line） 电路交换 （Circuit-switched） PPP, SLIP, HDLC HDLC, PPP, SLIP 包交换 （Packet-switched） X.25, Frame Relay, ATM 第二层典型的广域网封装协议 （Typical WAN Encapsulation Protocols: Layer 2） Telephone Company Service Provider
HDLC命令(HDLC Command) mm Cisco.com Router(config-if)#encapsulation hdlc ·HDLC是串行线路的默认封装 HDLC is the default encapsulation on synchronous serial interfaces 2006,Shenzhen Polytechnic.All rights reservec
© 2006, Shenzhen Polytechnic. All rights reserved. 6 HDLC命令（ HDLC Command） Router(config-if)#encapsulation hdlc • HDLC是串行线路的默认封装 • HDLC is the default encapsulation on synchronous serial interfaces
PPP组成（PPP Components) AIIIIIIIWIEE Cisco.com 1.HDLC PPP用HDLC作为点到点链路上基本的封装方法， PPP uses(HDLC)as a basis for encapsulating datagrams over point-to-point links. 2.LCP 建立、配置和测试数据链路的连接 Establishing,configuring,and testing the data-link connection. 3.NCP 建立和配置不同的网络层协议 Establishing and configuring different network-layer protocols
© 2006, Shenzhen Polytechnic. All rights reserved. 7 PPP组成（PPP Components ） 1. HDLC PPP用HDLC作为点到点链路上基本的封装方法. PPP uses (HDLC) as a basis for encapsulating datagrams over point-to-point links. 2. LCP 建立、配置和测试数据链路的连接 Establishing, configuring, and testing the data-link connection. 3. NCP 建立和配置不同的网络层协议 Establishing and configuring different network-layer protocols
PPP组成(PPP Components) Cisco.com Multiple protocol encapsulations using☒无法显示该图片。 NCPs in PPP TCP/IP PPP Encapsulation Novell IPX AppleTalk iL P ·PPP用NCP进行多种协议的封装 PPP can carry packets from several protocol suites using Network Control Programs ·PPP用LCP进行链路的建立与控制 PPP controls the setup of several link options using LCP 2006,Shenzhen Polytechnic.All rights reserved
© 2006, Shenzhen Polytechnic. All rights reserved. 8 TCP/IP PPP Encapsulation Novell IPX AppleTalk Multiple protocol encapsulations using NCPs in PPP • PPP用NCP进行多种协议的封装 • PPP can carry packets from several protocol suites using Network Control Programs • PPP用LCP进行链路的建立与控制 • PPP controls the setup of several link options using LCP Link setup and control using LCP in PPP PPP组成（PPP Components）
PPP各层元素(Layering PPP Elements) III厦 Cisco.com IP IPX Layer 3Protocols IPCP IPXCP Many Others Network Layer PPP 网络控制协议(Network Control Protocol) Authentication,other options Data Link 链路控制协议(Link Control Protocol) Layer Synchronous or Asynchronous Physical 物理介质(Physical Media) Layer 2006,Shenzhen Polytechnic.Allrightsr
© 2006, Shenzhen Polytechnic. All rights reserved. 9 Synchronous or Asynchronous 物理介质（Physical Media） 链路控制协议（Link Control Protocol） Authentication, other options 网络控制协议（Network Control Protocol） PPP Data Link Layer Physical Layer Network Layer IPCP IPXCP Many Others IP IPX Layer 3 Protocols PPP各层元素（Layering PPP Elements）
PPP会话建立（PPP Session Establishment) wwm Cisco.com 1.链路的建立和配置的协商 Link establishment and configuration negotiation 2.链路质量检测 Link-quality determination 3.网络层协议配置协调 Network-layer protocol configuration negotiation 4.链路终止 Link termination
© 2006, Shenzhen Polytechnic. All rights reserved. 10 PPP会话建立（PPP Session Establishment） 1. 链路的建立和配置的协商 Link establishment and configuration negotiation 2.链路质量检测 Link-quality determination 3.网络层协议配置协调 Network-layer protocol configuration negotiation 4.链路终止 Link termination