What is PPPoE vs PPPoA?

The difference between PPPoE and PPPoA is that PPPoE (Point-to-Point Protocol over Ethernet) expresses the essential features of PPP frames within the Ethernet frames succinctly whereas PPPoA (Point-to-Point Protocol over ATM) expresses the essential features of frames within AAL5 succinctly.

What is PPPoA networking?

In computer networking, the Point-to-Point Protocol over ATM (PPPoA) is a layer 2 data-link protocol typically used to connect domestic broadband modems to ISPs via phone lines. It is used mainly with DOCSIS and DSL carriers, by encapsulating PPP frames in ATM AAL5.

Is PPPoE better than PPPoA?

PPPoA is ever so slightly faster than PPPoE as PPPoA has 8 fewer bytes of overhead in every 1500 byte packet. Most users do not notice the difference which works out to be about one-half of one percent. Using PPPoA does avoid the Maximum Transfer Unit (MTU) issue.


Point-to-Point Protocol over Ethernet (PPPoE) and Point-to-Point Protocol over Asynchronous Transfer Mode (PPPoA) are Internet connection types mainly used by Digital Subscriber Line (DSL) ISPs to establish Internet connection for end-users. These are used mainly for DSL and Asymmetric DSL (ADSL) services.


The VDSL2 modem acts as an ethernet bridge. On the DSL side, it operates in PTM mode and not ATM mode, hence PPPoE rather than PPPoA. The modem encapsulates the ethernet frames from the IP router with a control header for transmission over the twisted pair to the DSLAM in the cabinet.

What is VC Mux and LLC?

The difference between LLC-mux and VC-mux comes about when multiple protocols are deployed over the same ADSL connection. LLC-mux allows protocols to be separated on a single ATM virtual circuit, whilst VC-mux requires one ATM virtual circuit per protocol but has lower overheads.

Is PPPoE or dynamic IP better?

PPPoE needs to be configured correctly before a user can actually connect to the Internet, however, DHCP doesn’t need to be configured and is basically plug and play. So using DHCP to connect to an ISP eliminates the problems that are associated with PPPoE.

What is the difference between PPPoE and bridge mode?

Differences Between PPPoE Mode and Bridge Mode PPPoE mode is always connected. There is no NAT in bridge mode. The computer connected to the modem in bridge mode gets the public IP address. Your computers get private IP addresses in PPPoE mode.


The VDSL2 modem acts as an ethernet bridge. On the DSL side, it operates in PTM mode and not ATM mode, hence PPPoE rather than PPPoA.

Which is better LLC or VC-MUX?

As its name suggests, VC-MUX can handle more data quicker than LLC. The big difference here is the “agreement” among the systems on any specific network. Put differently, the VC-MUX can send many different kinds of data under a single protocol, so long as all the units in the system agree on what that is.

Which is best PPPoE or static IP?

PPPoE vs Dynamic IP vs Static IP PPPoE is what lets your computer talk to your modem over an Ethernet network. If you have a static IP address, it means there’s an IP address reserved for you, and no matter how many times you connect and disconnect, you’ll always get that same address.

What is the difference between PPP and PPPoE?

Although traditional PPP is a peer-to-peer protocol, PPPoE is inherently a client-server relationship since multiple hosts can connect to a service provider over a single physical connection.

What was the original purpose of the PPPoE protocol?

PPPoE was initially designed to provide a small LAN with individual independent connections to the Internet at large, but also such that the protocol itself would be lightweight enough that it wouldn’t impinge on the hoped-for home usage market when it finally arrived.

Where is PPP configuration stored in a PPPoA?

Configuration of a PPPoA requires PPP configuration and ATM configuration. These data are generally stored in a cable modem or DSL modem, and may or may not be visible to—or configurable by—an end-user. PPP configuration generally includes: user credentials, user name and password, and is unique to each user.

Is the PPPoE protocol running on top of ATM?

In the world of DSL, PPPoE was commonly understood to be running on top of ATM (or DSL) as the underlying transport, although no such limitation exists in the PPPoE protocol itself. Other usage scenarios are sometimes distinguished by tacking as a suffix another underlying transport.