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Notes on WDS:
1.
All wireless access points in the wireless bridge need to support WDS.
At time of
publication, only Buffalo G54 and Apple Airport Extreme access points support WDS.
2.
No single access point can communicate with more then six other access points in the
wireless bridge.
3.
Start the wireless bridge system with only two access points and then add more, one
at a time.
4.
Set up all access points in the wireless bridge in close proximity before deploying them
to their
nal location.
5.
Only one access point in the wireless bridge should be serving DHCP and routing
services unless a routed wired network exists.
Troubleshooting WDS
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10BaseT:
802.3 based Ethernet network
that uses UTP (Unshielded twisted pair)
cable and a star topology.
10 Mbps data
tansmission speed.
100BaseT:
802.3 based Ethernet network
that uses UTP (Unshielded twisted pair)
cable and a star topology.
100 Mbps data
tansmission speed.
1000BaseT:
802.3 based Ethernet
network that uses UTP (Unshielded twisted
pair) cable and a star topology.
1000 Mbps
data tansmission speed.
802.1x:
The standard for wireless LAN
authentication used between an AP and a
client.
802.1x with EAP will initiate key
handling.
Access Point:
A hardware device that acts
as a communication hub for
Clients
(users
of wireless devices) to connect to a wired
LAN.
Ad-Hoc Network:
A network based on
peer-to-peer communication rather than a
router, switch, or hub.
Bandwidth:
The transmission capacity of
a computer or a communication channel,
usually stated in Megabits per second
(Mbps).
Bridge:
A device which forwards traf
c
between network segments with a common
network layer address, based on data link
layer information.
Client:
A PC, workstation, or other device
that connects to a network wirelessly
through an
Access Point
.
Cross-Over Cable:
A UTP cable that has its
transmit and receive pair crossed to allow
communications between two devices.
Default Gateway:
The IP Address of either
the nearest router or server for the LAN.
Glossary
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Destination Address:
The address portion
of a packet that identi
es the intended
recipient station.
DHCP (Dynamic Host Con
guration
Protocol):
Based on BOOTP, it uses a pool
of IP addresses, which it assigns to each
device connected to it, and retrieves the
address when the device becomes dormant
for a period of time.
DNS (Domain Name System):
System
used to map readable machine names into
IP addresses.
Driver:
Software that interfaces a
computer with a speci
c hardware device.
Dynamic IP Address:
An IP address that
is automatically assigned to a client station
in a TCP/IP network, typically by a DHCP
server.
Ethernet:
The most widely used
architecture for Local Area Networks
(LANs). It is a shared-media network
architecture. The IEEE 802.3 standard
details its functionality.
Ethernet cable:
A wire similar to telephone
cable that carries signals between Ethernet
devices.
It is designed to connect a single
device’s NIC to a router, switch, or hub.
See also
Crossover cable
.
File and Print Sharing:
A Microsoft
application that allows computers on a
network to share
les and printers.
Firmware:
Computer programming
instructions that are stored in a read-
only memory unit rather than being
implemented through software.
Frame:
A
xed block of data, transmitted
as a single entity.
Also referred to as a
packet.
Glossary
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Full-Duplex:
To transmit on the same
channel in both directions simultaneously.
Half-duplex:
To transmit on the same
channel in both directions, one direction at
a time.
Hub:
A device which allows connection
of computers and other devices to form a
LAN.
IEEE (Institute of Electrical and
Electronics Engineers):
The professional
organization which promotes development
of electronics technology.
IP (Internet Protocol) Address:
A unique
32-binary-digit number that identi
es each
sender or receiver of information sent in
packets.
Infrastructure:
A wireless network or
other small network in which the wireless
network devices are made a part of the
network through the Access Point.
ISP (Internet Service Provider):
A
company that provides access to the
Internet and other related services.
IV (Initialization Vector):
The header
section of an encrypted message packet.
LAN (Local Area Network):
A group
of computers and peripheral devices
connected to share resources.
LED (Light Emitting Diode):
The lights
on a hardware device representing the
activity through the ports.
MAC (Medium Access Control) Address:
The unique number that distinguishes
every network interface card.
Mbps (Mega Bits Per Second):
A
measurement of millions of bits per
second.
MDI/X (Media Dependent Interface/
Cross-over):
Port on a network hub or
switch that crosses the incoming transmit
lines with the outgoing receive lines.
Glossary
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PCMCIA (Personal Computer Memory Card
International Association) Card:
Removable
module that adds features to a portable
computer.
Peer-to-peer:
This simple network is formed by
connecting computers directly, without use of
routers or hubs.
A
crossover cable
is plugged
into an Ethernet port in each computer,
connecting them directly.
Ping (Packet Internet Groper):
An Internet
utility used to determine whether a particular
IP address is accessable.
Plug and Play:
Hardware that, once physically
installed,
nishes its installation automatically
and may immediately be used, as opposed
to hardware that requires further manual
con
guration.
PoE (Power over Ethernet):
A mechanism
to send DC power to a device using a CAT5
Ethernet cable.
MHz (MegaHertz):
One million cycles per
second.
NAT (Network Address Translation):
An
internet standard that enables a LAN to
use one set of IP addresses for internal
traf
c and a second set for external traf
c.
NIC (Network Interface Card):
An
expansion card connected to a computer
so the computer can be connected to a
network.
Packet:
A block of data that is transferred
as a single unit, also called a frame or a
block.
Packet Filtering:
Discarding unwanted
network traf
c based on its originating
address or its type.
PCI (Peripheral Component
Interconnect):
A bus that is connected
directly to the CPU.
Glossary
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