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(also The Point-to-Point Protocol over Ethernet)

PPPoE definition

A network protocol that encapsulates Point-to-Point Protocol (PPP) within the Ethernet link-layer protocol. PPPoE combines the security features of PPP and Ethernet, which supports multiple users on a LAN. PPPoE manages the data traveling over the cable networks. It also allows a single server connection to be divided between multiple clients. As a result, multiple clients can connect to the same server and access the internet simultaneously, unlike PPP, which allows only one-on-one connections. When PPPoE was first implemented, ISPs could start offering internet connection to more people.


PPPoE is considered to be outdated technology and is increasingly being replaced by DHCP. As it supports automatic IP assignment and enables IP usage monitoring and reassignment, DHCP makes network administrators’ work easier, faster, and less prone to human error.

PPPoE phases:

  • The Discovery Phase. The PPPoE client discovers the local Ethernet MAC address and establishes a session ID. Users then choose a PPPoE server they want to use.
  • The Session Phase. After the connection is established, PPPoE starts to transfer the data. Users are connected to the internet, and their connection is secured by PPP.

Further reading

Ultimate digital security