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.