Exam Code: 642-821
Exam Name: Building Cisco Remote Access Networks (BCRAN)
Updated: Sep 29, 2026
Q & A: 244 Questions and Answers
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| Section | Weight | Objectives |
|---|---|---|
| ISDN and DDR Connectivity | 25% | - ISDN call control and bandwidth management - ISDN BRI and PRI components and operation - ISDN troubleshooting - Configuring and verifying ISDN BRI/PRI - Dial-on-Demand Routing (DDR) concepts |
| Frame Relay Connectivity | 20% | - Frame Relay concepts and terminology - Configuring Frame Relay encapsulation and mapping - Subinterfaces and bandwidth control - Frame Relay traffic shaping and troubleshooting |
| Remote Access Overview and Asynchronous Connections | 20% | - Configuring asynchronous lines and modems - Remote access technologies and requirements - Modem standards and cabling - Modem autoconfiguration and troubleshooting |
| VPN and Advanced Remote Access | 15% | - IPsec VPN fundamentals - Scaling and securing remote access networks - Configuring site-to-site IPsec VPNs - QoS for remote access links |
| PPP and Access Control | 20% | - AAA framework, TACACS+ and RADIUS - PAP and CHAP authentication - PPP protocol features and negotiation - Multilink PPP and compression |
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