cisco ccna exam are you ready

cisco ccna exam are you ready.LCP)2. Identity verification (LCP) o3. Protocol negotiation (NCP) oStep 1 is the link establishment phase. In this step, the LCP negotiates the PPP parameters to be used for the connection, which may include the authentication method and compression algorithm. If authentication is configured, the authentication method is negotiated-either PAP or CHAP, which are discussed later in the "PPP Authentication" section. If authentication is configured and the authentication methods match on both ends, authentication is performed (step 2). If authentication is passed, the NCP negotiates the higher layer protocols (step 3), which may include protocols such as IP and IPX that will be transported over the PPP link, as well as data link layer protocols (bridging traffic, such as Ethernet and Cisco CDP)After the LCP and NCP have finished negotiating and the connection has been authenticated (if configured), the data link layer will be in a normal state (the status of the router interface will be "knock, lineprotocolis knock") oAfter the connection is established, LCP uses error detection to monitor dropped data on the connection and data-link layer loops. The LCP uses the Qualityand MagicNumbers protocol to confirm that the connection is still reliable.Exam Essentials The LCP is responsible for negotiating and maintaining the PPP connection. including optional authentication. The NCP is responsible for negotiating the upper layer protocols that are transported over the PPP connection.24.3.2 Configuring PPP