Fichas
CWNA - Flash Cards - Chapter 5
Fichas del conjunto (48)
- 13 Phyiscal (PHY) layer specfications for 802.111) Infrared
2) FHSS
3) DSSS - 2802.11 radios PHY that can transmit in channels subdivided from the entire 2.4 GHzDSSS
- 3Radios, which are permitted to transmit on 1 MHz subcarriers in the 2.4FHSS
- 41 Mbps and 2 Mbps data rates were part of the ______ 802.11 standardOriginal
- 5802.11b is also known asHigh-Rate DSSS (HR-DSSS)
- 6Uses CCK (Complementary Code Keying)802.11b
- 7Data rates of 1, 2, 5.5, and 11 Mbps802.11 - 1, 2 Mbps
HR-DSSS: 802.11b - 5.5, 11Mbps - 8Uses 3 different 100 MHz unlicensed frequency5Ghz
- 9Data rates of 6, 9, 12, 18, 24, 36, 48, and 54 Mbps5Ghz (OFDM)
- 10Technology called Extended Rate Physical (ERP)802.11g
- 11Two mandatory PHYs are: ERP-OFDM and ERP-DSSS/CCK802.11g
- 12Two optional PHYs are: ERP-PBCC and DSSS-OFDM802.11g
- 13Country code information is delivered in beacons and probe responses802.11d
- 14Defines mechanisms for dynamic frequency selection (DFS) and transmit power control (TPC)802.11h
- 155.150 GHz–5.250 GHzU-NII-1 (lower)
4 channels - 165.250 GHz–5.350 GHzU-NII-2 (middle)
4 channels - 175.47 GHz–5.725 GHzU-NII-2 Extended
802.11h 11 channels - 185.725 GHz–5.825 GHzU-NII-3 (upper)
4 channels - 19Major security enhancements in Wireless Standard802.11i
- 20Data privacy using RC-4 ciphersTKIP
- 21Data privacy using AES encryptionCCMP
(Cipher Block Chaining Message Authentication Code Protocol) - 22Defines the entire method for authentication, generating encryption keys for clients and APsRobust Security Network (RSN)
- 23Japanese 4.9 GHz and 5 GHz bands802.11j
- 24Wireless Standard for QoS802.11e
- 25Contention-based method determining who gets to transmit on the wireless medium nextDistributed Coordination Function (DCF)
- 26Access point briefly takes control of the medium and polls the clientsPoint Coordination Function (PCF)
- 27Has 2 access mechanisms to provide QoSHybrid Coordination Function (HCF)
- 28- extension to DCF - provide for the “prioritization of frames” based on upper-layer protocolsEnhanced Distributed Channel Access (EDCA)
- 29- Extension of PCF - Gives the access point the ability to provide for “prioritization of stations.” - Like PCF never adopted by WLAN vendorsHybrid Coordination Function Controlled Channel Access (HCCA)
- 30WMMWireless Multi Media
- 31Fast basic service set transition (FT)802.11r
- 32Radio Resource Management (RRM)802.11k
- 33802.11k: 802.11h defined this for 5GHz frequencyTransmit Power Control (TPC)
- 34802.11k: These client statistics are reported back to the AP for RRM- Signal-to-Noise (SNR)
- Signal strength (RSSI)
- Data rates - 35Noise floor information and Channel load information is reported back to the access point802.11k - RRM
- 36Learn details about other access points that the client might want to roam to from the access point or the WLAN ControllerNeighbour reports
- 37Robust management frames Designed to prevent DOS attacks against management frames802.11w
- 38Broadcast and multicast frames are protected using the Broadcast/Multicast Integrity Protocol (BIP)802.11w
- 39Known as Wireless Access in Vehicular Environments (WAVE)802.11p
- 40Allows client stations to bypass the access point and communicate with direct frame exchanges802.11z
Direct Link Setup (DLS) - 41Wi-Fi Alliance’s Hotspot 2.0 specification and its Passpoint certification This standard and certification is designed to provide seamless roaming for wireless devices between your Wi-Fi network and other partner networks, similar to how cellular telephone networks provide roaming802.11u
- 42Provides for an exchange of information that can potentially ease the configuration of client stations wirelessly from a central point of management802.11v
Defines Wireless Network Management (WNM) - 43Standardizing mesh networking using the IEEE 802.11 MAC/PHY layers802.11s
- 44QoS enhancements to the 802.11 Media Access Control (MAC) for robust audio and video streaming for both consumer and enterprise applications802.11ae
- 45Very High Throughput (VHT) at 60Ghz at up to 7 Gbps802.11ad
- 46256-QAM modulation802.11ac
- 47Null data packet (NDP)Used in 802.11ac beamforming
- 48Use of wireless in the newly opened TV white space (TVWS) frequencies between 54 MHz and 790 MHz802.11af
Información
- Descripción
- CWNA Fichas sobre CWNA - Flash Cards - Chapter 5, creado por Amit Pindoria el 23/02/2017.
- Creado por
- Amit Pindoria
- Visitas
- 23
- Etiquetas
- Valoración