PPPoA - Computer Definition

A protocol that encapsulates PPP frames in ATM Adaptation Layer 5 (AAL5). PPPoA is used primarily in cable modems, wireless devices, and ADSL broadband local loops for Internet access and is specified in RFC 2364. In an ADSL implementation, PPPoA is employed in the local loop between the customer premises equipment (CPE) and the DSL access multiplexer (DSLAM). See also AAL5, ADSL, ATM, broadband, cable modem, CPE, DSLAM, encapsulate, Internet, local loop, and PPP.

Webster's New World Telecom Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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(Point-to-Point Protocol Over ATM) Using the PPP dial-up protocol with ATM as the transport. Used by some DSL providers, IP packets travel from the PC over Ethernet to the DSL modem, officially known as an "ADSL transceiver unit-remote" (ATU-R). The ATU-R adds the PPP protocol to the IP packets and transports them to the carrier's DSLAM via ATM. PPPoEoA (PPP Over Ethernet Over ATM) PPPoEoA is an alternative to PPPoA. PPPoEoA takes advantage of the authentication and security features of PPP by providing end-to-end PPP connectivity. It establishes the PPP session in the PC rather than at the DSL modem. See PPP, PPPoE, DSL and ATM.

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