I-BGP synchronization with IGP

The BGP synchronization rule requires that when a BGP router receives information about a network from an IBGP neighbor, it does not use that information until a matching route is learned via an IGP or static route.

What does it mean a matching route in this statement? Same prefix? Next-hop? Etc.

Vlan propagation and Cisco FabricPath

PC-A and PC-B belong to the same broadcast domain that is defined by vlan X. Without FabricPath (FP), a frame that is sent by PC-A is received by FP-SW1. PC-1 MAC source address is learnt by FP-SW1 in CAM to ease further frame local forwarding decisions.