4517dc03___and_how_to_prepare_for_them___Description
[Step] 5 [Consideration] AS_PATH length [Description] 
Since BGP routing tables contain paths that use AS’s as hops (i.e. from AS 101 to AS 201 to AS 301…), the one with the lowest AS_PATH length is preferred. For example, if router1 has a path to a specific prefix through only one other AS it would be preferred over a second path that has a path through two other AS’s.
Top 5 Hardest Topics on the CCNP ROUTE Exam (and how to prepare for them)
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