The command “ppp authentication chap pap” command indicates the CHAP authentication is used first. (config-if)# ppp authentication chap fallback ppp (config-if)# ppp authentication chap papĭ. (config-if)# authentication ppp chap papĬ. (config-if)# authentication ppp chap fallback pppī.
Match the ppp frame field to the description serial#
Which of the following command is used to enable CHAP authentication with PAP as the fallback method on a serial interface?Ī. However, the multilink is not functioning properly. In the following exhibit, Router A is configured for PPP multilink to Router B. Asynchronous connections used to be only available on low-speed (<2MB) serial interfaces, but now, there are the new HWICs (High-Speed WAN Interface Cards) which also support asynchronous mode.
Note: Serial links can be synchronous or asynchronous. With synchronous circuits, we need to use clock rate. PPP supports both synchronous (like analog phone lines) and asynchronous circuits (such as ISDN or digital links). Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms? Which two options are valid WAN connectivity methods? (Choose two) Router B defaults to the HDLC protocol because no encapsulation is configured. Router A is configured to use the PPP encapsulation protocol. This configuration has an encapsulation mismatch. The encapsulation on both routers should be configured as PPP. The interfaces on Router A and Router B should be matching for authenticationĭ. The bandwidth should be configured the same on both routers.Ĭ. Username on Router B should match Router B’s hostname.ī. The username on Router A should match Router A’s hostname and the In the following exhibit, Router A will not form a PPP connection with Router B.Ī. Main(config-if)# encapsulation frame-relay How would you configure the serial interface of the main office router to make the connection? The router at the remote office is a non-Cisco router. Once the link setup is completed, PPPoE functions as a Layer 2 encapsulation method, allowing data to be transferred over the PPP link within PPPoE headers.Īs a network administrator, you were asked to configure a serial link between the main office and a remote location. PPP Session Phase: PPP options are negotiated and authentication is made. The process here is to assign a Session ID which enables the PPPoE layer to be established.Ģ. Active Discovery Phase: this is when the PPPoE client locates a PPPoE server, called an access concentrator. This could be due to numerous reasons, such as conflicting options or authentication failure.ĭuring which phase of PPPoE is PPP authentication performed?ġ. The LCP closed line states that the LCP process has not completed. The router does not have an IP address configured. In the following exhibit, what does the line “ LCP closed” mean?ī. Link Termination: The process of closing an existing link when it is no longer needed. Link Maintenance: The process of managing an opened link. Link Configuration: The process of setting up and negotiating the parameters of a link. There are three main stages of “link life” and LCP plays a key role in each one: Common LCP options include the PPP MRU, the authentication protocol, compression of PPP header fields, callback, and multilink options. LCP negotiates link for PPP parameters to dynamically configure the data link layer of a connection. LCP is the chief controller protocol of PPP it is responsible for its overall successful operation.
There are different PPP suite protocols, the single most important protocol is the PPP Link Control Protocol (LCP). The Link Control Protocol (LCP) is documented in RFC 1661. Which PPP subprotocol negotiates authentication options? I suggest you use packet tracer for practice. But it all works the same way, try and understand the technique. Note: This PPP Questions and Answers are used for demonstration purpose only, you will see different IP addressing, configuration and Port allocation in the real CCNA exam. You might see a different IP addressing, Port allocation and PPP Configurations.Īs usual, take time to read through the question so as to clearly understand what you are required to do. This is an Updated CCNA exam question (October 2020).
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