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5
Click
OK
to close the window.
Figure 174
Security Settings - Java
JAVA (Sun)
1
From Internet Explorer, click
Tools
,
Internet Options
and then the
Advanced
tab.
2
Make sure that
Use Java 2 for <applet>
under
Java (Sun)
is selected.
3
Click
OK
to close the window.
Figure 175
Java (Sun)
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Mozilla Firefox
Mozilla Firefox 2.0 screens are used here. Screens for other versions may vary.
You can enable Java, Javascript and pop-ups in one screen. Click
Tools,
then click
Options
in the screen that appears.
Figure 176
Mozilla Firefox: Tools > Options
Click
Content
.to show the screen below. Select the check boxes as shown in the
following screen.
Figure 177
Mozilla Firefox Content Security
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A
PPENDIX
D
Wireless LANs
Wireless LAN Topologies
This section discusses ad-hoc and infrastructure wireless LAN topologies.
Ad-hoc Wireless LAN Configuration
The simplest WLAN configuration is an independent (Ad-hoc) WLAN that connects
a set of computers with wireless adapters (A, B, C). Any time two or more wireless
adapters are within range of each other, they can set up an independent network,
which is commonly referred to as an ad-hoc network or Independent Basic Service
Set (IBSS). The following diagram shows an example of notebook computers
using wireless adapters to form an ad-hoc wireless LAN.
Figure 178
Peer-to-Peer Communication in an Ad-hoc Network
BSS
A Basic Service Set (BSS) exists when all communications between wireless
clients or between a wireless client and a wired network client go through one
access point (AP).
Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is
enabled, wireless client
A
and
B
can access the wired network and communicate
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with each other. When Intra-BSS is disabled, wireless client
A
and
B
can still
access the wired network but cannot communicate with each other.
Figure 179
Basic Service Set
ESS
An Extended Service Set (ESS) consists of a series of overlapping BSSs, each
containing an access point, with each access point connected together by a wired
network. This wired connection between APs is called a Distribution System (DS).
This type of wireless LAN topology is called an Infrastructure WLAN. The Access
Points not only provide communication with the wired network but also mediate
wireless network traffic in the immediate neighborhood.
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