Referring to the topology diagram show in the exhibit, which three statements are correct regarding the BGP routing updates? (Choose three.)

Question

Exhibit

Options

• AThe EBGP routing updates received by R1 from R5 will be propagated to the R2, R4, and R7
• BThe EBGP routing updates received by R3 from R6 will be propagated to the R2 and R4
• CThe EBGP routing updates received by R1 from R5 will be propagated to the R2 and R4
• DThe IBGP routing updates received by R3 from R2 will be propagated to the R6 router
• EThe IBGP routing updates received by R2 from R1 will be propagated to the R3 router
• FThe IBGP routing updates received by R1 from R4 will be propagated to the R5, R7, and R2

• A
  73% (27)
• C
  8% (3)
• E
  5% (2)
• F
  14% (5)

Explanation

The correct answers reflect key BGP propagation rules. A is correct: EBGP-learned routes (R1 from R5) are freely propagated to all IBGP peers (R2, R4) and any other EBGP peers (R7). B is correct: EBGP-learned routes (R3 from R6) are propagated to R3's IBGP peers R2 and R4. D is correct: Routes learned via IBGP (R3 from R2) CAN be advertised to an EBGP peer (R6), because IBGP-to-EBGP advertisement is permitted. E is incorrect due to the IBGP split-horizon rule: routes learned from one IBGP peer are NOT re-advertised to other IBGP peers (without route reflectors or confederations), so R2 cannot propagate R1's IBGP update to R3. C is incorrect because it omits R7 as a destination. F is incorrect because IBGP-learned routes are not re-advertised to EBGP peers in a way that would include R5 and R7 from R4's IBGP session in this topology.

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