This read-only counter tracks how many times the client responded to the switch's initial EAP-Request with something other than an EAP-NAK, confirming the supplicant is capable of using the authentication method the switch chose. An administrator uses this to distinguish a supplicant capability mismatch, which would show up as NAKs rather than being counted here, from a supplicant that accepts the method but then fails for another reason. For example, a rising count here alongside authentication failures suggests the client accepted the chosen EAP method but failed the actual credential check, not a method-compatibility issue.