Rl has the following configurations:[R1] aaa[R1-aaa] authentication-scheme auth1[R1-aaa-authen-authl] authentication-mode radius local[R1-aaa-authen-authl] quitAccording to the preceding...

The authentication-mode radius local configuration defines an authentication sequence in which RADIUS is attempted first and local authentication is used as a fallback under the conditions defined by Huawei AAA processing. A critical distinction exists between a RADIUS service being unavailable and a RADIUS server explicitly rejecting the credentials. If the RADIUS server is unreachable, times out, or otherwise cannot perform the authentication service, local authentication may be used as the backup method. However, when the device successfully contacts the RADIUS server and receives an explicit authentication failure or Access-Reject response, that is a definitive authentication result rather than a server-unavailable condition. The device does not simply bypass the rejection and retry the same user against the local database, because doing so would undermine centralized authentication policy. The question explicitly states that R1 is properly connected to the RADIUS server and that the server sends an authentication failure message. Therefore, the claimed fallback to local authentication does not occur in this situation. The statement is FALSE and option B is correct.