Page 106 / 109
Scroll up to view Page 101 - 105
W300D
W300D
W300D
Wireless-N
Wireless-N
Wireless-N
ADSL2+
ADSL2+
ADSL2+
Router
Router
Router
101
a subscriber to receive data (download) at
speeds
of
up
to
1.544
megabits
(not
megabytes)
per
second,
and
to
send
(upload) data at speeds of 128 kilobits per
second. Thus the "Asymmetric" part of the
acronym.
ATM
ATM
ATM
ATM stands for Asynchronous Transfer Mode.
A transmission protocol that breaks down
user
traffic
into
small
fixed-sized
cells,
before
reassembling
them
after
transmission.
During
transmission,
cells
from
different
users
are
asynchronously
intermixed,
thereby
maximizing
network
resources. The ATM advantages voice and
video
stream
and
data
transmission
in
single network.
VPI
VPI
VPI
Stands for "Virtual Path Identifier." The VPI
is an 8-bit header inside each ATM cell that
indicates where the cell should be routed. It
is used to identify the virtual path (a bundle
of
virtual
channels
that
have
the
same
endpoint)
to
which
the cell
belongs
as it
travels through an ATM network. As an ATM
Page 107 / 109
W300D
W300D
W300D
Wireless-N
Wireless-N
Wireless-N
ADSL2+
ADSL2+
ADSL2+
Router
Router
Router
102
cell
moves
across
a
network,
it
typically
passes through several ATM switches. The
VPI tells the switches where to route the
packet of information, or what path to take.
Hence
the
name,
"virtual
path
identifier."
The VPI is used in conjunction with the VCI,
or virtual channel identifier.
VCI
VCI
VCI
Stands for "Virtual Channel Identifier." The
VCI indicates where an ATM cell is to travel
over a network. The VCI within each ATM
cell defines the fixed channel on which the
packet of information should be sent. It is a
16-bit field, compared to the VPI, which is
only
8
bits.
Since
this
numerical
tag
specifies
the
virtual
channel
that
each
packet belongs to, it prevents interference
with
other
data
being
sent
across
the
network.
Bridging
Bridging
Bridging
Here is related to the well-known RFC1483
bridging protocol. This feature is working on
the
basic
bridging
protocol
and
physical
layer.
In
this device,
Modem
serves as a
bridge
device,
and
does
not
provide
any
Page 108 / 109
W300D
W300D
W300D
Wireless-N
Wireless-N
Wireless-N
ADSL2+
ADSL2+
ADSL2+
Router
Router
Router
103
protocol
transfer
and
address
filtering
features. In this case, the Modem actually
plays the role as Hub.
IPoA
IPoA
IPoA
It is related to RFC1577. Usually the data
packets are transferred via ATM network. In
this connection mode, user must have static
IP
address,
subnet
mask
and
other
parameters.
Lack
of
user
name
and
password
authentication,
it
can
not
implement network administration and QoS
features, so this access way will not prevail
any more.
PPPoA
PPPoA
PPPoA
Short
for
Point-to-Point
Protocol
over
Asynchronous Transfer Mode (ATM).
PPPoA
relies
on
two
widely
accepted
standards:
PPP
and
ATM.
It
is
an
end-to-end
asymmetric
digital
subscriber
line
(ADSL)
architecture. IP packets travel from the PC
over Ethernet to the DSL modem, called the
ADSL transceiver unit-remote (ATU-R). The
ATU-R
adds
the
PPP
protocol
to
the
IP
packets and transports them to the carrier's
Digital
Subscriber
Line
Access
Multiple
Page 109 / 109
W300D
W300D
W300D
Wireless-N
Wireless-N
Wireless-N
ADSL2+
ADSL2+
ADSL2+
Router
Router
Router
104
(DSLAM)
via
ATM.
It
is
a
technology
becoming more popular with DSL providers.
PPPoE
PPPoE
PPPoE
Acronym
for
Point-to-Point
Protocol
over
Ethernet.
PPPoE
relies
on
two
widely
accepted
standards:
PPP
and
Ethernet.
PPPoE is a specification for connecting the
users
on
an
Ethernet
to
the
Internet
through
a
common
broadband
medium,
such as a single DSL line, wireless device or
cable
modem.
All
the
users
over
the
Ethernet
share
a
common
connection,
so
the Ethernet principles supporting multiple
users in a LAN combine with the principles
of
PPP,
which apply to serial connections.
19216811.live