Refer to the exhibit. A network administrator has configured EIGRP authentication between routers R1 and R2. After the routing tables are reviewed, it is noted that neither router is receiving EIGRP updates. What is a possible cause for this failure?

Refer to the exhibit. A network administrator has configured EIGRP authentication between routers R1 and R2. After the routing tables are reviewed, it is noted that neither router is receiving EIGRP updates. What is a possible cause for this failure?

• The same key chain name must be used on each router.
• The same number of key strings must be used on each router.
• The key string should be used in interface mode instead of the key chain.
• The same autonomous system numbers must be used in the interface configurations of each router.
• The authentication configuration is correct, issue the show ip eigrp neighbors command to troubleshoot the issue.

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