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cisco ccna exam price.Be sure to familiarize yourself with the command ppp authentication, in which you can specify the primary authentication method and the secondary authentication method OIf you specify pap chap or chap pap, the router negotiates the parameters for both authentication methods in the order specified. For example, if youconfigure chap pap,the router will first attempt to negotiate CHAP; if that fails, it will then negotiate PAP.Microsoft provides its own CHAP, but it is not compatible with the RFC version of CHAP. Therefore, if a Microsoft device is connecteddevice is connected, the authentication parameter needs to be set to ms-chapoTroubleshooting authenticationTo determine if authentication has been passed, use the command show interfacesoInternet address is 192.168.1.2 255.255.255.0 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usee, rely 254/255, load 1/255 Encapsulation PPP, loopback not set , keepalive set (10 sec) lep nep nep nep nep nepstate = ACKRCVD ccp state = NOT NEGOTIATED osicp nep ipep state = CLOSED state = NOT NEGOTIATED xnscp state nep ipxcp state = NOT NEGOTIATED nep vinesep = NOT NEGOTIATED deccp state = NOT state = NOT NEGOTIATED nep bridgeep state = NEGOTIATED NOT NEGOTIATED nep lex state = NOT NEGOTIATEDatalkcp state = NOT NEGOTIATED nep cdp state CLOSED SerialO is up, line protocol is down Hardware is MCI Serial