Refer to the exhibit. When running EIGRP, what is required for RouterA to exchange routing updates with RouterC?

Question

Exhibit

Options

• AAS numbers must be changed to match on all the routers
• BLoopback interfaces must be configured so a DR is elected
• CThe no auto-summary command is needed on Router A and Router C
• DRouter B needs to have two network statements, one for each connected network

• A
  93% (43)
• B
  4% (2)
• C
  2% (1)

Explanation

EIGRP requires all routers in the same routing domain to share the same Autonomous System (AS) number. Routers with mismatched AS numbers will not form EIGRP neighbor relationships and therefore will not exchange routing updates. In the exhibit, RouterA and RouterC are configured with different AS numbers, which prevents adjacency formation. RouterB, sitting between them, cannot relay EIGRP updates between routers in different AS domains. The fix is to ensure all routers use the same AS number. The other options are incorrect because DR election applies to OSPF (not EIGRP), 'no auto-summary' addresses discontiguous networks but won't fix AS mismatches, and RouterB's network statements are irrelevant if the AS numbers differ.

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