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RSTP, PVST+, PVRST+, and MSTP
#1
Hi,

  I'm currently taking CCNA courses but was recently stuck with STP. To be exact, I'm not stuck with what it does, just some protocols related to it.

  So far, I understand that RSTP is much faster than STP. PVST+ is composed of PortFast, BackboneFast, and UplinkFast. But then, I was stuck by the relationship between RSTP, PVST+, and PVRST+. The review book I'm using (CCNA Exam Cram) tells me that "A Cisco Catalyst switch running PVST+ or PVRST+ maintains an instance of spanning tree for each active VLAN that is configured on the switch.", which I currently have no idea what it means. Please guide me out of this mess, thanks.

  Also, the Trunking part is kind of ambiguous, so to speak. What exactly is a trunk? is it just a protocol (that would be 802.1Q or ISL, right?) or hardware (cross-over cable?)?
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RSTP, PVST+, PVRST+, and MSTP - by Angela_Zou - 01-25-2010, 08:40 AM

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