Refer to the exhibit. Which route filtering technique is required within AS64514 to ensure that BGP prefixes originating locally are not accepted from AS64512 or AS64513?

Question

Exhibit

Options

• Aan as-path access-list matching the originating AS number attached to a deny route-map
• Bno prefix-list or as-path access-list filtering technique is to be applied to each neighbor, either
• Ca prefix-list matching the locally originated prefixes attached to a deny route-map statement, with
• Dan as-path access-list matching the originating AS number attached to a deny route-map

• A
  84% (31)
• B
  5% (2)
• C
  3% (1)
• D
  8% (3)

Explanation

Applying an inbound route-map with an as-path access-list that denies prefixes containing the local AS number ensures that routes originated by AS64514 are not accepted back from neighboring ASes, thus preventing routing loops and prefix duplication.

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