Refer to the exhibit. The network administrator is troubleshooting the connectivity issue between RA and RB. According to the partial configuration, what is the cause of the problem?
Refer to the exhibit. The network administrator is troubleshooting the connectivity issue between RA and RB. According to the partial configuration, what is the cause of the problem?

- password mismatch for PPP authentication
- username mismatch for PPP authentication
- encapsulation method mismatch for PPP authentication
- authentication method mismatch for PPP authentication
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