Unlike traditional IGPs, BGP uses a complex path selection process before electing a path which will be used to forward packets destined to each destination prefix. Understanding and being intimately familiar with the BGP path selection process is a mandatory requirement of the ROUTE exam. It is imperative that you take your time to ensure that you are very comfortable with the path selection process that is described in this section.
By default, a BGP speaker receiving UPDATES selects only a single best path from this set of multiple UPDATES and installs that into the IP routing table. Having stated . . .
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