The difference between the routing and switching exams for the CCNP are pretty distinct. The BSCI exam tests a candidate's knowledge on their ability to manage medium-to-large routing environments in which you would need to know how to configure enterprise technologies such as IPv6, multicast routing, BGP, EIGRP, ODPF, and ISIS. The BCMSN exam concerns itself more with attaching enterprise-level switches to these routers and managing the switched traffic with advanced Spanning Tree technologies, VLANs and Inter-VLAN routing, and even some wireless and voice concepts.
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