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Point-to-Point over Ethernet (PPPoE) is a network protocol that encapsulates Point-to-Point Protocol (PPP) frames within Ethernet frames, enabling the establishment of direct connections over Ethernet networks. It is commonly used by internet Service Providers (ISPs) to manage multiple users on a single Ethernet segment, allowing for authentication, encryption, and compression. PPPoE facilitates dynamic IP address assignment and session management for end-user devices connecting to the internet. This method is particularly prevalent in DSL broadband services.

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