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Refer to the exhibit. Router "R1" and "R2" are connected through their serial interfaces. For some reason their serial interfaces remain in an up/down state. What can be the issue? There are 2 problems here, pick the more specific issue PASSWORDS FROM USERNAME AND PAP SENT USERNAME MUST MATCH NO EXHIBIT

Passwords from username and pap sent-username must match.

The "ppp pap sent-username" command must indicate the peer end username.

Router R1 must have a username other than R2 and the same for R2.

The command "ppp authentication pap" must be followed by the keyword chap.



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