| Users: | L- | 
| Hints: | -- | 
| Huntgroups: | -- | 
| Additivity: | N/A | 
| Proxy propagated: | No | 
This Attribute indicates the response value provided by a PPP Challenge-Handshake Authentication Protocol (CHAP) user in response to the challenge. It is only used in Access-Request packets.
The CHAP challenge value is found in the CHAP-Challenge Attribute (60) if present in the packet, otherwise in the Request Authenticator field.
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