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Cisco 642-821 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Frame Relay Connectivity | 20% | - Frame Relay traffic shaping and troubleshooting - Frame Relay concepts and terminology - Configuring Frame Relay encapsulation and mapping - Subinterfaces and bandwidth control |
| Topic 2: PPP and Access Control | 20% | - PAP and CHAP authentication - PPP protocol features and negotiation - Multilink PPP and compression - AAA framework, TACACS+ and RADIUS |
| Topic 3: ISDN and DDR Connectivity | 25% | - Dial-on-Demand Routing (DDR) concepts - Configuring and verifying ISDN BRI/PRI - ISDN BRI and PRI components and operation - ISDN call control and bandwidth management - ISDN troubleshooting |
| Topic 4: VPN and Advanced Remote Access | 15% | - Configuring site-to-site IPsec VPNs - QoS for remote access links - IPsec VPN fundamentals - Scaling and securing remote access networks |
| Topic 5: Remote Access Overview and Asynchronous Connections | 20% | - Modem autoconfiguration and troubleshooting - Modem standards and cabling - Configuring asynchronous lines and modems - Remote access technologies and requirements |
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