Knowledge Base - WiFi Basics

WiFi Glossary

• 802.11 State Machine
• 802.11aa
• 802.11a
• 802.11ae
• 802.11b
• 802.11k
• 802.11r
• 802.11u
• 802.11w
• 802.1X
• 802.3
• AAA Server Credential
• AAA Framework
• Absorption
• Access Category (AC)
• Access Control List (ACL)
• Access Layer Forwarding
• Access Port
• Acknowledgement Frame
• Active Mode
• Active Scanning
• Active Survey
• Ad‐Hoc Mode
• Adjacent Channel Interference (ACI)
• Adjacent Overlapping Channels
• AES (Advanced Encryption Standard)
• Aggregated MAC Protocol Data Units (A‐MPDU)
• AirTime Fairness
• Amplification
• Amplifier
• Amplitude
• Announcement Traffic Indication Message (ATIM)
• Antenna
• Association
• Association ID (AID)
• Attenuation
• Attenuator
• Authentication
• Authentication and Key Management (AKM)
• Authentication Server
• Authenticator
• Automatic Power Save Delivery (APSD)
• Autonomous AP
• Azimuth Chart
• Backoff Timer
• Band Steering
• Bandwidth
• Basic Service Area (BSA)
• Basic Service Set (BSS)
• Basic Service Set Identification (BSSID)
• Beacon Frame
• Beamforming
• Beamwidth
• Bill of Materials (BOM)
• Block Acknowledgement
• Bridge
• BSS Transition
• Byte
• Bit
• Capacity
• Captive Portal
• CardBus
• Carrier Frequencies
• Carrier Sense Multiple Access (CSMA)
• Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
• Counter Cipher Mode with Block Chain Message Authentication Protocol (CCMP)
• CCMP/AES
• Centralized Forwarding
• Certificate Authority (CA)
• Channel Width
• Clear Channel Assessment (CCA)
• Clear‐to‐Send (CTS) Frame
• Client Utilities
• Coding
• Collision Avoidance (CA)
• CompactFlash (CF)
• Containment
• Contention Window
• Control Frame
• Controlled Port
• Controller‐Based AP
• Coverage
• Data Frame
• Data Rate
• dBd (decibel to dipole)
• dBi (decibel to isotropic)
• dBm (decibel to milliwatt)
• Deauthentication Frame
• Decibel (dB)
• Delay
• Delivery Traffic Indication Message (DTIM)
• Differentiated Services Code Point (DSCP)
• Diffraction
• Dipole Antenna
• Direct‐Sequence Spread Spectrum (DSSS)
• Disassociation Frame
• Distributed Coordination Function (DCF)
• Distribution System (DS)
• Distribution System Medium (DSM)
• Domain Name System (DNS)
• Driver
• Duty Cycle
• Dynamic Frequency Selection (DFS)
• Dynamic Rate Switching (DRS)
• Elevation Chart
• Encryption
• Enhanced Distributed Channel Access (EDCA)
• Equivalent Isotropically Radiated Power (EIRP)
• Extended Rate Physical (ERP)
• Extended Service Set (ESS)
• Extensible Authentication Protocol (EAP)
• Fade Margin
• Fast Fourier Transform (FFT)
• Fragmentation
• Frame
• Frame Aggregation
• Free Space Path Loss
• Frequency
• Fresnel Zones
• Full Duplex
• Gain
• Group Master Key (GMK)
• Group Key Handshake
• Group Temporal Key (GTK)
• Guard Interval (GI)
• Guest Networks
• Half Duplex
• Hidden Node
• High Density
• High Throughput (HT)
• High Rate Direct Sequence Spread Spectrum (HR/DSSS)
• Hotspot
• Independent Basic Service Set (IBSS)
• Institute of Electrical and Electronics Engineers (IEEE)
• Intentional Radiator
• Interframe Space (IFS)
• Internet Engineering Task Force (IETF)
• Isotropic Radiator
• Interference
• Jitter
• Jumbo Frame
• Latency
• Layer 1 (PHY)
• Layer 2
• Layer 3
• Layer 4
• Lightning Arrestor
• Link Budget
• Loss
• MAC Filtering
• Management Frame
• Master Session Key (MSK)
• Maximal Ratio Combining (MRC)
• Maximum Transmission Unit (MTU)
• Mesh
• Mesh BSS
• Milliwatt (mW)
• Mobile User
• Modulation
• Modulation and Coding Scheme (MCS)
• MAC Protocol Data Unit (MPDU)
• MAC Service Data Unit (MSDU)
• Multi‐User MIMO (MU‐MIMO)
• Multipath
• Multiple Channel Architecture (MCA)
• Multiple Input/Multiple Output (MIMO)
• Narrowband Interference
• Near-Far
• Network Allocation Vector (NAV)
• Network Segmentation
• Network Time Protocol (NTP)
• Noise
• Noise Floor
• Octet
• 802.11ac
• Omni‐Directional Antenna
• Open System Authentication
• Opportunistic Key Caching (OKC)
• OSI (Open Systems Interconnection) Model
• Packet
• Pairwise Master Key (PMK)
• Passive Gain
• Passive scanning
• Passive Survey
• Passphrase Authentication
• Phase
• PHY
• Physical (PHY) Layer
• Physical Layer Convergence Protocol (PLCP)
• Physical Medium Dependent (PMD)
• PMK Caching
• PoE Injector
• Point‐to‐Multipoint (PtMP)
• Point‐to‐Point (PtP)
• Polarization
• Power over Ethernet (PoE)
• PPDU
• Pre‐shared Key (PSK)
• Preauthentication
• Primary Channel
• Probe Request
• Probe Response
• Protected Management Frame (PMF)
• Protocol Analyzer
• Protocol Decodes
• PSDU
• PTK (Pairwise Transient Key)
• Quality of Service (QoS)
• QoS BSS
• Radio Chains
• Radio Frequency (RF)
• Radio Resource Management (RRM)
• RC4 (Rivest Cipher 4)
• Real‐Time Location Service (RTLS)
• Reassociation
• Received Channel Power Indicator (RCPI)
• Received Signal Strength Indicator (RSSI)
• Reflection
• Refraction
• Regulatory Domain
• Remote AP
• Remote Authentication Dial‐In User Service (RADIUS)
• Request to Send/Clear to Send (RTS/CTS)
• Resolution Bandwidth (RBW)
• Retry
• Return Loss
• RF Cables
• RF Calculator
• RF Connector
• RF Coverage
• RF Line of Sight (LoS)
• RF Link
• RF Propagation
• RF Signal Splitter
• RF Site Survey
• Roaming
• Robust Security Network (RSN)
• Robust Security Network Association (RSNA)
• Rogue Access Point
• Rogue Containment
• Rogue Detection
• Role‐Based Access Control (RBAC)
• RSN Information Element
• RTS Threshold
• Scattering
• Secondary Channel
• Semi-Directional Antenna
• Service Set Identifier (SSID)
• Signal Strength
• Signal to Noise Ratio (SNR)
• Single Input Single Output (SISO)
• Space‐Time Block Coding (STBC)
• Spatial Multiplexing (SM)
• Spatial Multiplexing Power Save (SMPS)
• Spatial Streams
• Spectrum Analysis
• Spectrum Analyzer
• Station (STA)
• Supplicant
• Sweep Cycle
• System Operating Margin (SOM)
• Temporal Key Integrity Protocol (TKIP)
• Transition Security Network (TSN)
• Transmit Beamforming (TxBF)
• Transmit Power Control (TPC)
• Uncontrolled Port
• User Priority (UP)
• Virtual Carrier Sense
• Voltage Standing Wave Ratio (VSWR)
• Watt
• Wavelength
• Wi‐Fi Alliance
• Wi‐Fi Multimedia (WMM)
• Wi‐Fi Multimedia Power Save (WMM‐PS)
• Wi‐Fi Protected Setup (WPS)
• Wired Equivalent Privacy (WEP)
• Wireless Intrusion Prevention System (WIPS)
• Wireless Local Area Network (WLAN)
• WPA‐Personal
• WPA2‐Personal
• WPA2‐Enterprise
• Co‐Channel Interference (CCI)
• Highly‐Directional Antenna
• 802.11ah
• 802.11e
• 802.11g
• 802.11i
• 802.11n
• 802.11y
• 802.11ax-2021
• Access Point (AP)
• 40 MHz Intolerant
• 4‐Way Handshake
• 802.11

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