A network administrator is configuring the authentication for EIGRP routing. The administrator enters these commands:R1(config)# key chain THE_KEY
R1(config-keychain)# key 1
R1(config-keychain-key)# key-string key123What is the next step necessary to enable the authentication for EIGRP routing?
- Configure the priority of authentication algorithms to be used.
- Configure the authentication on all interfaces that are participating in EIGRP.
- Configure an ACL to identify the networks that are participating in EIGRP.
- Configure the authentication in the router eigrp as-number configuration mode.
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