20
WLAN ADSL2+ Router
PPPoE (RFC 2516)
This document describes how to build PPP sessions and encapsulate PPP
packets over Ethernet. PPP over Ethernet (PPPoE) provides the ability to
connect a network of hosts over a simple bridging access device to a remote
Access Concentrator.
PVC
Permanent Virtual Circuit. Connection-oriented permanent leased line circuit
between end-stations on a network over a separate ATM circuit.
RFC
Request for Comments. The document series, begun in 1969, which describes
the Internet suite of protocols and related experiments. Not all RFCs describe
Internet standards, but all Internet standards are written up as RFCs
RFC 1483
Multi-protocol encapsulation over AAL-5. Two encapsulation methods for
carrying network interconnect traffic over ATM AAL-5. The first method allows
multiplexing of multiple protocols over a single ATM virtual circuit. The
protocol of a carried PDU is identified by prefixing the PDU by an IEEE 802.2
Logical Link Control (LLC) header. This method is in the following called
"LLC Encapsulation". The second method does higher-layer protocol
multiplexing implicitly by ATM Virtual Circuits (VCs). It is in the following
called "VC Based Multiplexing".
Router
A system responsible for making decisions about which of several paths
network (or Internet) traffic will follow. To do this, it uses a routing protocol to
gain information about the network and algorithms to choose the best route
based on several criteria known as "routing metrics.
Spanning Tree
Spanning-Tree Bridge Protocol (STP). Part of an IEEE standard. A mechanism
for detecting and preventing loops from occurring in a multi-bridged
environment. When bridges connect three or more LAN segments, a loop can
occur. Because a bridge forwards all packets that are not recognized as being
local, some packets can circulate for long periods of time, eventually degrading
system performance. This algorithm ensures only one path connects any pair
of stations, selecting one bridge as the 'root' bridge, with the highest priority
one as identifier, from which all paths should radiate.
TELNET
The virtual terminal protocol in the Internet suite of protocols. Allows users of
one host to log into a remote host and act as normal terminal users of that
host.
VCI
Virtual Circuit Identifier. Part of the ATM cell header, a VCI is a tag indicating
the channel over which a cell will travel. The VCI of a cell can be changed as it
moves between switches via Signaling.
