Which statement accurately describes the difference between 802.11b WLAN ad hoc and
infrastructure modes?

A.
Access points are rarely used in 802.11b WLANs.

B.
The ad hoc mode requires an Access Point to communicate to the wired network.

C.
Wireless nodes can communicate peer-to-peer in the infrastructure mode.

D.
Wireless nodes can communicate peer-to-peer in the ad hoc mode.

Explanation:
Nodes on an IEEE 802.11b wireless LANs can communicate in one of two modes: ad hoc or
infrastructure. In ad hoc mode, the wireless nodes communicate directly with each other, without
establishing a connection to an access point on a wired LAN. In infrastructure mode, the wireless
nodes communicate to an access point, which operates similarly to a bridge or router and manages
traffic between the wireless network and the wired network. Source: Wireless Security Essentials by
Russell Dean Vines (Wiley, 2002). Figure A.3 shows access points attached to a wired LAN to create
an Infrastructure Mode 802.11b WLAN.