Which ADSL implementation type involves configuring the ATU-R with PPP authentication information (login and password), which provides per session Authentication, Authorization, and Accounting without requiring PPP client on each PC on the subscriber side?
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A. B. C. D.A.
The correct answer is A. PPPoA.
Asymmetric Digital Subscriber Line (ADSL) is a type of digital subscriber line technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide.
PPPoA (Point-to-Point Protocol over Asynchronous Transfer Mode) is an ADSL implementation type where the ADSL modem is configured with PPP authentication information (login and password). PPPoA provides per-session Authentication, Authorization, and Accounting (AAA) without requiring a PPP client on each PC on the subscriber side.
PPP (Point-to-Point Protocol) is a widely used protocol for connecting communication devices, especially for dial-up connections. PPPoA combines PPP with ATM (Asynchronous Transfer Mode) to provide a connection between the subscriber's PC and the internet service provider's (ISP) network. PPPoA is typically used by ADSL service providers in Europe and some other regions.
In contrast, PPPoE (Point-to-Point Protocol over Ethernet) requires a PPP client on each PC on the subscriber side, which can be inconvenient for subscribers who have multiple devices to connect to the internet. PPPoE is typically used by ADSL service providers in North America.
RFC 1483 Bridge and RFC 1483 Routing are other ADSL implementation types that define the encapsulation and framing of Ethernet frames within ATM cells, but they do not provide per-session AAA like PPPoA.
Therefore, the correct answer to the question is A. PPPoA.