Appendix E Wireless Lans; Figure 582 Peer-To-Peer Communication In An Ad-Hoc Network; Wireless Lan Topologies - ZyXEL Communications ZyWALL USG 100 Series User Manual

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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 582 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 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.
ZyWALL USG 100/200 Series User's Guide
Wireless LANs
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