1/28/20101/28/2010Network Plus
Wireless Protocols
Wireless Printer Setup WPSUsed to automatically configure
printers for Wireless operationRequires WPS compatibility on
Printer and Access PointOperationPIN methodPush-button methodUSB
method
WPS SetupPIN Method
PIN Method, in which a personal identification number (PIN) has
to be read from either a sticker or the display on the new wireless
device. This PIN must then be entered at the "representant" of the
network, usually the access point of the network. Alternately, a
PIN on the Access Point may be entered into the new device. The PIN
Method is the mandatory baseline mode; every Wi-Fi Protected Setup
certified product must support it.PIN Method Security IssueIn
December 2011, researcher Stefan Viehbck reported a design and
implementation flaw that makes brute-force attacks against
PIN-based WPS feasible to perform on WPS-enabled Wi-Fi networks. A
successful attack on WPS allows unauthorized parties to gain access
to the network. The only effective workaround is to disable
WPS.[4]WPS Push-button methodPress WPS button on PrinterWithin 2
minutes press the WPS button on your access
point.http://www.youtube.com/watch?v=mJdhmbDgYzcWPSUSB MethodUSB
Method, in which the user uses a USB flash drive to transfer data
between the new client device and the access point of the network.
Support of this mode is optional, but deprecatedWireless
Distribution SystemWDSA wireless distribution system (WDS) is a
system enabling the wireless interconnection of access points in an
IEEE 802.11 network. It allows a wireless network to be expanded
using multiple access points without the traditional requirement
for a wired backbone to link them. The notable advantage of WDS
over other solutions is it preserves the MAC addresses of client
frames across links between access points.[WDS PerformanceThe
maximum wireless effective throughput may be halved after the first
retransmission (hop) being made. For example, in the case of two
APs connected via WDS, and communication is made between a computer
which is plugged into the Ethernet port of AP 1 and a laptop which
is connected wirelessly to AP 2. The throughput is halved, because
AP 2 has to retransmit the information during the communication of
the two sidesWDS Ethernet Bridge PerformanceIn the case of
communications between a computer which is plugged into the
Ethernet port of AP 1 and a computer which is plugged into the
Ethernet port of AP 2, the throughput is not halved since there is
no need to retransmit the information. Dual band/radio APs may
avoid this problem, by connecting to clients on one band/radio, and
making a WDS network link with the other.Pico AntennaPicoStation M2
HPwww.ubnt.comRangeOutdoor - 1600ftIndoor 650 ft Multiple
configuration setupsAccess pointRepeater BridgePico Access
Point
Pico WDS Repeater
Pico Wireless BridgeTransparent bridge between buildingsRequires
two Pico antennas
Network+ Guide to Networks, 5th EditionNetwork+ Guide to
Networks, 5th EditionThe End
