Summary:Multicasting's confusing at first, but for your CCNP and CCIE studies, you must master the details.  Learn about the RPF Check from Chris Bryant, CCIE #12933. Keywords:cisco, ccnp, bcmsn, multicasting, rpf, check, reverse, path, forwarding, pass, exam, free, tutorial Article Body:Multicasting is a vital topic on your BCMSN, CCNP, and CCIE exams, and it can also be very...