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PPPoE
The answer was another encapsulation
protocol, PPPoE (PPP over Ethernet). PPPoE runs
the PPP protocol over an Ethernet connection, in contrast to the original
PPP, which runs it over a serial modem connection (usually a dialup
modem)
PPPoE allows users to connect
to their broadband ISP’s with Dial Up Networking
the same way they’d connect to a POTS or ISDN ISP
connection. It lets ISP’s use the tools that have worked with
PPP users for years to validate logins and passwords, track network
log in and log out … and even kick users off the network if they’ve
been on it for too many consecutive hours using that connection.
Many but not all broadband
ISP’s use PPPoE. For example, DSL-based ISP’s who
make use of this technology include Ameritech and Earthlink. Because
PPPoE technology improves resource management for ISP’s, expect
to see it used by more and more ISP’s as broadband connections
become more popular.
 PPPoE Setup
To connect to an ISP using PPPoE via DSL, you need a user ID and password in addition to your DSL device connection parameters
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![[spacer]](1p.gif)  Watch the hardware in PPPoE
A challenge for users with ISP’s who use PPPoE is that not all cable and DSL modems commercially available support PPPoE connections. Many still assume an always-on dedicated connection. This means that if you don’t opt to use equipment provided or specified by your ISP, you must be extra cautious when buying hardware to connect your DSL or cable modem connection to your computer or home LAN.
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This concludes our discussion of
common remote access technologies and protocols. Next, we will move
into the area of network-to-network communications using wide area networking.
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