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objections to 802.11, 7–9, 330–334
office hotspots, 4, 261–262, 262
offset, frequency, 18
omnidirectional antennas, 43–45, 44, 238, 238
online video, 299–300
open access model of frequency spectrum, 324
open shortest path first (OSPF), 127
open system authentication, 28, 72–75, 73
Open System Interconnection (OSI) model
media access control (MAC) and, 26, 27
multiprotocol label switching (MPLS) in, 134–135
operation of wireless networks, 263–265
Orinoco, 71, 234, 235
orthogonal frequency division multiplexing (OFDM), 23–26, 50, 212
basic service set (BSS) in, 25–26
carrier multiplexing in, 25
carrier sense multiple access with collision avoidance (CSMA/CD) in, 25
code division multiple access (CDMA) in, 24
frequency division multiplexing (FDM) and, 25
independent BSS (IBSS) in, 25–26
interference and, 111
multilink point-to-point protocol (MPPP) in, 25
power management in, 25–26
time synchronization in, 25–26
outside plant, 4
overlapping channels, 229, 230
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