User's Manual

B222s User’s Guide 229
APPENDIX D
Wireless LANs
Wireless LAN Topologies
This sect ion discusses ad- hoc and infrastructure wireless LAN t opologies.
Ad-hoc Wireless LAN Configuration
The sim plest WLAN configurat ion is an independent ( Ad- hoc) WLAN t hat connects a set of
com puters wit h wireless adapt ers ( A, B, C). Any t im e t wo or m ore wireless adapt ers are within
range of each other, t hey can set up an independent net w ork, which is com m only referred to as an
ad- hoc net work or I ndependent Basic Service Set ( I BSS) . The following diagram show s an exam ple
of not ebook com put ers using wireless adapt ers t o for m an ad- hoc wireless LAN.
Figure 162 Peer- t o- Peer Com m unicat ion in an Ad- hoc Network
BSS
A Basic Service Set ( BSS) exists when all com m unicat ions bet ween wireless client s or bet w een a
wir eless client and a wired net work client go t hrough one access point (AP) .
I nt ra- BSS t raffic is t raffic bet ween wireless client s in t he BSS. When I nt ra- BSS is enabled, wireless
client A and B can access t he wired net work and com m unicate with each ot her. When I ntra- BSS is