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Refer to the exhibit. Router R1 and R2 were configured with PPP encapsulation. The output was obtained from router R2. Which of the following two statements are true about the result of the command executed? (Choose two)
The output displays the default encapsulation process of a Cisco router.
Router R1 and R2 cannot communicate.
The command "debug ppp negotiation" was issued.
Router R1 and R2 agree on NCP negotiation.
The command "show ppp interfaces" was executed.
The command "debug ppp negotiation" shows a real-time negotiation of ppp, where both ends agree on NCP parameters. The output includes the LCP negotiation, authentication and NCP negotiation. PPP has three components, 1) An encapsulation component, 2) LCP (Link control Protocol) and NCP (Network Control Protocol). If link and PPP parameters have been successfully negotiated with LCP, then PPP neighbors will use multiple NCP (Network Control Protocol) messages to negotiate individual LAN protocols. IPCP (Internet Protocol Control Protocol) and CDPCP (Cisco Discovery Protocol Control Protocol) occur in the NCP phase. For more information refer to: http://www.ciscopress.com/articles/article.asp?p=2202412&seqNum=7 And, http://www.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/25440-debug-ppp-negotiation.html
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