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Path Considerations
AS4 has two /16’s, and chooses the one through AS3.
AS4 still has the addresses within 10.1.1.0/24 as reachable through AS3, since 10.1.0.0/16 contains 10.1.1.0/24.
AS4
AS1
AS5
/24
/24
/16
/16
/16
/16
PPT Version