What is PPPoE?

December 23, 2022
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The PPP connection is improved by the Point-to-Point Protocol over Ethernet (or PPPoE), which also permits shared usage. Let’s examine it in further depth.

The PPPoE definition

A network protocol called Point-to-Point Protocol over Ethernet  wraps the Point-to-Point Protocol (PPP) inside the Ethernet link-layer protocol. PPPoE combines Ethernet’s ability to accommodate many users on a LAN with PPP’s security characteristics.

PPPoE controls how data moves over cable networks. Additionally, it enables the division of a single server connection across several clients. Multiple customers can consequently connect to the same server and use the internet at the same time.

Describe PPP

We must first define PPP in order to comprehend PPPoE. PPP serves as the direct line of communication between two routers with no further networking required. It offers transmission, data compression, and authentication. It’s an antiquated protocol that was widely used for many kinds of physical networks in the 1980s and 1990s. Point-to-Point Protocol over Ethernet is a more developed form of PPP that makes it possible for PPP capabilities to be used by several users concurrently.


How does PPPoE function?

Think about a conference call with multiple persons. If some of them used the same earpiece for listening and talking, communication would be challenging. Each individual having their own gadget to listen to and talk into would be more practical.

Internet users receive their own “earpieces” through PPPoE. Returning to the comparison, Point-to-Point Protocol over Ethernet enables more client devices to be utilized on a server, allowing for more effective communication between participants thanks to the usage of individual earpieces. One-to-many connections are possible using PPPoE. (unlike PPP, which allows only one-on-one connections). ISPs are now able to provide internet access to a larger population as a result.

Routers with PPPoE settings are typically given to consumers by internet service providers. Additionally, they provide you a special login and password.
Point-to-Point Protocol over Ethernet functions in two stages:

  1. The investigation stage. In this step, the PPPoE client learns the local Ethernet MAC address and establishes a session ID. A Point-to-Point Protocol over Ethernet server can then be selected by users.
  2. Phase of the session. Point-to-Point Protocol over Ethernet  begins to send data when the discovery phase is over and a connection has been made between a host and a server. PPP secures the user’s connection to the internet at that point.

How come PPPoE is used?

Following are a few PPPoE use cases:

  1. Customers of ISPs receive internet service using broadband connections using PPPoE. By using DCL cable or a modem, providers can link several hosts on a single Ethernet LAN to a distant location.
  2. PPPoE may be used by individual users to secure their network as well. However, it is a disused protocol that is out of date.


PPPoE is an old technology that is currently being gradually superseded by DHCP or (Dynamic Host Configuration Protocol). Administrators can automate IP address assignment via DHCP. Because it makes it possible to track and distribute addresses from centralized locations, it is more centralized. Network administrators would have to manually configure IP addresses if DHCP didn’t exist.

Point-to-Point Protocol over Ethernet requires prior configuration. It wraps the network based on credential access, in contrast to DHCP, which does not require authentication in order to offer you a random IP address.

In conclusion, Point-to-Point Protocol over Ethernet  and DHCP accomplish separate tasks; the former allows PPP connections over Ethernet, whilst the latter assigns IP addresses without authentication.