Refer to the exhibit. Considering that R2, R3, and R4 are correctly configured, why did R1 not establish an adjacency with R2, R3, and R4?

Refer to the exhibit. Considering that R2, R3, and R4 are correctly configured, why did R1 not establish an adjacency with R2, R3, and R4?

• because the automatic summarization is enabled on R1
• because the IPv4 address on Fa0/0 interface of R1 is incorrect
• because the Fa0/0 interface of R1 is declared as passive for EIGRP
• because there is no network command for the network 192.168.1.0/24 on R1

Explanation: The missing routes are the result of there not being an EIGRP adjacency between R1 and R2, R3, and R4.To establish adjacency, a router must send and receive hello packets over an interface to and from its neighbors. The interface Fa0/ of the router R1 is declared as passive, so R1 will not send hello packets over its interface Fa0/0.

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