From: Mas Kato (loomis_towcar@xxxxxxxxxxxxxx)
Date: Tue Apr 09 2002 - 00:15:56 GMT-3
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Chang,
None of the answers fully meets the requirement in all cases. But D is the clos
est answer. If you leave off the 'callin' keyword on r1, only r1 will authentic
ate r2 no matter who initiates the call.
Regards,
Mas Kato
https://ecardfile.com/id/mkato
> "ying chang" <ying_c@hotmail.com> ccielab@groupstudy.com multiple-choice: one
way ppp auth chapDate: Mon, 08 Apr 2002 22:14:17 -0400
>Reply-To: "ying chang" <ying_c@hotmail.com>
>
>Sorry about beating the dead horse. I need help to get this one down. What
>is your choice in case you are asked to do "one way ppp authentication"? The
>"debug ppp auth" result is at the bottom of each case, I know most people
>would choose B, but I feel a little bit uneasy on mutual authentication
>taking place when r2 calls r1:
>
>A. r1 - ppp auth chap callback
> r2 - ppp auth chap
>
> result: r1 call r2 => r2 challenge r1
> r2 call r1 => r2 challenge r1
>----------------------------------------------
>B. r1 - ppp auth chap callin
> r2 - ppp auth chap
>
> result: r1 call r2 => r2 challenge r1
> r2 call r1 => mutual authentication
>----------------------------------------------
>C. r1 - ppp auth chap callin
> r2 - ppp auth chap but r2 is not allowed to call r1
>
> result: r1 call r2 => r2 challenge r1
>----------------------------------------------
>D. r1 - ppp auth chap callin
> r2 - no ppp auth chap statement
>
> result: r1 call r2 => no authentication
> r2 call r1 => r1 challenge r2
>-----------------------------------------------
>
>Thanks,
>Chang
>
>
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