CCNA 4.1: Configure and verify PPP and MLPPP on WAN interfaces using local authentication


Point-to-Point Protocol (PPP) and MultiLink Point-to-Point Protocol (MLPPP) are layer 2 data-link layer communications protocols used to establish connections between two directly connected nodes.


Study Notes:

  • Point-to-Point Protocol (PPP) is a layer 2 data-link layer communications protocol
  • PPP is used to establish a direct connection between two nodes
  • PPP connects two devices, typically routers, directly together without any other devices in between
  • PPP can provide authentication, encryption and compression
  • MultiLink Point-to-Point Protocol (MLPPP) is two or more PPP connections configured together to aggregate the connections
  • On a single PPP line frames cannot arrive out of order, but this is possible when the frames are divided among multiple PPP connections
  • Multilink PPP must number the fragments so they can be put in the right order again when they arrive
  • PPP can use three different types of authentication:
    • Password Authentication Protocol (PAP)
    • Challenge Authentication Protocol (CHAP)
    • Extensible Authentication Protocol (EAP)
  • PPP local authentication refers to PAP



PacketTracer Lab: CCNA-4.1-Configure-and-verify-PPP-on-WAN-interfaces-using-local-authentication.pkt

PacketTracer Lab: CCNA-4.1-Configure-and-verify-MLPPP-on-WAN-interfaces-using-local-authentication.pkt


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