{"product_id":"ieee-802-11-handbook-isbn-9780738144498","title":"IEEE 802.11 Handbook","description":"The first generation 802.11 wireless market, once struggling to expand, has spread from largely vertical applications such as healthcare, point of sale, and inventory management to become much more broad as a general networking technology being deployed in offices, schools, hotel guest rooms, airport departure areas, airplane cabins, entertainment venues, coffee shops, restaurants, and homes. This has led to the tremendous growth of new sources of IEEE 802.11 devices. IEEE 802.11 equipment is now moving into its second stage, where the wireless LAN is being treated as a large wireless communication system. As a system, there is more to consider than simply the communication over the air between a single access point and the associated mobile devices. This has lead to innovative changes in the equipment that makes up a wireless LAN. The \u003ci\u003eIEEE 802.11 Handbook: A Designer’s Companion, Second Edition\u003c\/i\u003e is for the system network architects, hardware engineers and software engineers at the heart of this second stage in the evolution of 802.11 wireless LANs and for those designers that will take 802.11 to the next stage. \u003cp\u003eIntroduction xxv\u003c\/p\u003e \u003cp\u003eAcronyms and abbreviations xxxi\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 1 Similarities and differences between wireless and wired\u003c\/b\u003e local area networks (LANs) 1\u003c\/p\u003e \u003cp\u003eSimilarities between WLANs and wired LANs 1\u003c\/p\u003e \u003cp\u003eDifferences between WLANs and wired LANs 1\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 2 IEEE 802.11: First international standard for WLANs 5\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eIEEE 802.11 architecture 5\u003c\/p\u003e \u003cp\u003eSTA 6\u003c\/p\u003e \u003cp\u003eBasic service set (BSS) 6\u003c\/p\u003e \u003cp\u003eExtended service set (ESS) 8\u003c\/p\u003e \u003cp\u003eDistribution system (DS) 9\u003c\/p\u003e \u003cp\u003eServices 10\u003c\/p\u003e \u003cp\u003eSTA services 10\u003c\/p\u003e \u003cp\u003eDistribution services 11\u003c\/p\u003e \u003cp\u003eInteraction between some services 12\u003c\/p\u003e \u003cp\u003eSummary 15\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 3 Medium access control (MAC) 17\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eMAC functionality 17\u003c\/p\u003e \u003cp\u003eMAC frame exchange protocol 17\u003c\/p\u003e \u003cp\u003eDealing with the media 18\u003c\/p\u003e \u003cp\u003eHidden node problem 18\u003c\/p\u003e \u003cp\u003eRetry counters 21\u003c\/p\u003e \u003cp\u003eBasic access mechanism 22\u003c\/p\u003e \u003cp\u003eTiming intervals 23\u003c\/p\u003e \u003cp\u003eDistributed coordination function (DCF) 24\u003c\/p\u003e \u003cp\u003eCentrally controlled access mechanism (i,e„ PCF) 24\u003c\/p\u003e \u003cp\u003eFrame formats 28\u003c\/p\u003e \u003cp\u003eGeneral frame format 29\u003c\/p\u003e \u003cp\u003eFrame Control field 31\u003c\/p\u003e \u003cp\u003eDuration\/ID field 37\u003c\/p\u003e \u003cp\u003eAddress fields 37\u003c\/p\u003e \u003cp\u003eSequence Control field 39\u003c\/p\u003e \u003cp\u003eFrame Body field 40\u003c\/p\u003e \u003cp\u003eFCS field 40\u003c\/p\u003e \u003cp\u003eControl frame subtypes 41\u003c\/p\u003e \u003cp\u003eRequest to Send (RTS) [control] frame 41\u003c\/p\u003e \u003cp\u003eClear to Send (CTS) [control] frame 42\u003c\/p\u003e \u003cp\u003eAcknowledge (ACK) [control] frame 42\u003c\/p\u003e \u003cp\u003ePower Save Poll (PS-Poll) [control] frame 44\u003c\/p\u003e \u003cp\u003eContention-Free End (CF-End) and CF-End plus ACK (CF-End + ACK) [control] frames 44\u003c\/p\u003e \u003cp\u003eData frame subtypes 45\u003c\/p\u003e \u003cp\u003eSimple data frame 45\u003c\/p\u003e \u003cp\u003eData with Contention-Free Acknowledgment (Data + CF-ACK) frame 48\u003c\/p\u003e \u003cp\u003eData with Contention-Free Poll (Data + CF-Polt) frame 48\u003c\/p\u003e \u003cp\u003eData + CF-ACK + CF-Poll frame 49\u003c\/p\u003e \u003cp\u003eNull Function (no data) frame 49\u003c\/p\u003e \u003cp\u003eCon tent ion-Free Acknowledgment (CF-ACK) (no data) frame 49\u003c\/p\u003e \u003cp\u003eContention-Free Poll (CF-Poll) (no data) frame 49\u003c\/p\u003e \u003cp\u003eCF-ACK + CF-Potl (no data) frame 50\u003c\/p\u003e \u003cp\u003eManagement frame subtypes 50\u003c\/p\u003e \u003cp\u003eBeacon [management] frame 51\u003c\/p\u003e \u003cp\u003eProbe Request and Probe Response [management] frames 52\u003c\/p\u003e \u003cp\u003eAuthentication [management] frame 53\u003c\/p\u003e \u003cp\u003eDeauthentication [management] frame 54\u003c\/p\u003e \u003cp\u003eAssociation Request and Association Response [management] frames 54\u003c\/p\u003e \u003cp\u003eReassociation Request and Reassociation Response [management] frames 54\u003c\/p\u003e \u003cp\u003eDisassociation [management] frame 55\u003c\/p\u003e \u003cp\u003eAnnouncement Traffic Indication Message (ATIM) [management] frame 55\u003c\/p\u003e \u003cp\u003eAction [management] frame 55\u003c\/p\u003e \u003cp\u003eComponents of the management frame body 55\u003c\/p\u003e \u003cp\u003eFixed fields 55\u003c\/p\u003e \u003cp\u003eInformation elements 68\u003c\/p\u003e \u003cp\u003eOther MAC operations 86\u003c\/p\u003e \u003cp\u003eFragmentation 86\u003c\/p\u003e \u003cp\u003ePrivacy 89\u003c\/p\u003e \u003cp\u003eWEP details 92\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 4 IEEE 802.11i security enhancements 95\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eRobust security network (RSN) 96\u003c\/p\u003e \u003cp\u003eIEEE 802.1 X Authentication and Key Management Protocol (AKMP) 105\u003c\/p\u003e \u003cp\u003eDetails of IEEE 802.1X EAP AKMP operation 108\u003c\/p\u003e \u003cp\u003eEAPOL-Key frames 109\u003c\/p\u003e \u003cp\u003ePSK AKMP 112\u003c\/p\u003e \u003cp\u003eDetails of PSK AKMP operation 113\u003c\/p\u003e \u003cp\u003ePMK caching 114\u003c\/p\u003e \u003cp\u003ePreauthentication 114\u003c\/p\u003e \u003cp\u003eTransition security networks (TSNs) 115\u003c\/p\u003e \u003cp\u003eConfidentiality: New encryption algorithms 116\u003c\/p\u003e \u003cp\u003eFixing WEP: Temporal Key Integrity Protocol (TKIP) 116\u003c\/p\u003e \u003cp\u003eTKIP operation 117\u003c\/p\u003e \u003cp\u003eMichael MIC 120\u003c\/p\u003e \u003cp\u003eTKIP-encrypted frame description 120\u003c\/p\u003e \u003cp\u003eAttack countermeasures 122\u003c\/p\u003e \u003cp\u003eNew transforms 122\u003c\/p\u003e \u003cp\u003eCCMP-encrypted frame description 124\u003c\/p\u003e \u003cp\u003eSecurity management 126\u003c\/p\u003e \u003cp\u003eChanges to existing attributes and tables 126\u003c\/p\u003e \u003cp\u003eNew attributes and tables 127\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 5 IEEE P802.11e quality of service (QoS) enhancements 137\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eBackground: What is QoS and why is QoS needed? 137\u003c\/p\u003e \u003cp\u003eIEEE P802.1 le: What’s in and what’s out 138\u003c\/p\u003e \u003cp\u003eThe Scope of IEEE 802.11 standard 138\u003c\/p\u003e \u003cp\u003eMandatory and optional features 138\u003c\/p\u003e \u003cp\u003eLimits of WLANs 138\u003c\/p\u003e \u003cp\u003eBackground of the legacy IEEE 802.11 MAC 139\u003c\/p\u003e \u003cp\u003eFundamentals of IEEE P802.1 le operation 140\u003c\/p\u003e \u003cp\u003eHybrid coordination function (HCF) 140\u003c\/p\u003e \u003cp\u003eEnhanced distributed channel access (EDCA) 142\u003c\/p\u003e \u003cp\u003eEDCA admission control 144\u003c\/p\u003e \u003cp\u003eHCF controlled channel access (HCCA) 145\u003c\/p\u003e \u003cp\u003eIEEE P802.1 le frame formats 145\u003c\/p\u003e \u003cp\u003eNew control frame subtypes 146\u003c\/p\u003e \u003cp\u003eNew data frame subtypes 148\u003c\/p\u003e \u003cp\u003eNew extensions to management frames 154\u003c\/p\u003e \u003cp\u003eAction [management] frames 159\u003c\/p\u003e \u003cp\u003eNew information element formats 169\u003c\/p\u003e \u003cp\u003eOptional features in IEEE P802.1 le 182\u003c\/p\u003e \u003cp\u003eContention-free bursts (CFBs) 182\u003c\/p\u003e \u003cp\u003eBlock acknowledgments 182\u003c\/p\u003e \u003cp\u003eDirect link setup (DLS) 183\u003c\/p\u003e \u003cp\u003eAutomatic power save delivery (APSD) 187\u003c\/p\u003e \u003cp\u003eIEEE P802.1 le as part of complete QoS implementation 187\u003c\/p\u003e \u003cp\u003eScheduling and admission control 187\u003c\/p\u003e \u003cp\u003eAdapting to varying wireless channel conditions 188\u003c\/p\u003e \u003cp\u003eInterface to higher layers 189\u003c\/p\u003e \u003cp\u003eConclusion 190\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 6 IEEE 802.1 lh dynamic frequency selection (DFS) and transmit power control (TPC) 191\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eUsers of the 5 GHz frequency  192\u003c\/p\u003e \u003cp\u003eNew parts to the IEEE 802.11 protocol 192\u003c\/p\u003e \u003cp\u003eTransmit power control (TPC) 197\u003c\/p\u003e \u003cp\u003eTPC operation 199\u003c\/p\u003e \u003cp\u003eSpectrum management 200\u003c\/p\u003e \u003cp\u003eDetection of radar operation 205\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 7 IEEE 802.11d international operation 207\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eNew roaming requirements 208\u003c\/p\u003e \u003cp\u003eCountry information element 210\u003c\/p\u003e \u003cp\u003eInternational roaming with FH PHYs 212\u003c\/p\u003e \u003cp\u003eRequest information element and its protocol 214\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 8 IEEE 802.1 IF Inter Access Point Protocol (IAPP) 217\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eGoing beyond the MAC 217\u003c\/p\u003e \u003cp\u003eMore about mobility 218\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 9 MAC management 221\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eTools available to meet the challenges 222\u003c\/p\u003e \u003cp\u003eAuthentication 223\u003c\/p\u003e \u003cp\u003eAssociation 225\u003c\/p\u003e \u003cp\u003eAddress filtering (MAC function) 227\u003c\/p\u003e \u003cp\u003ePrivacy (MAC function) 228\u003c\/p\u003e \u003cp\u003ePower management 228\u003c\/p\u003e \u003cp\u003ePower management in an IBSS 228\u003c\/p\u003e \u003cp\u003ePower management in an infrastructure BSS 230\u003c\/p\u003e \u003cp\u003eSynchronization 232\u003c\/p\u003e \u003cp\u003eTimer synchronization in an infrastructure BSS 233\u003c\/p\u003e \u003cp\u003eTimer synchronization in an IBSS 234\u003c\/p\u003e \u003cp\u003eSynchronization with FH PHYs 235\u003c\/p\u003e \u003cp\u003eScanning 235\u003c\/p\u003e \u003cp\u003eJoining a BSS 237\u003c\/p\u003e \u003cp\u003eCombining management tools 237\u003c\/p\u003e \u003cp\u003eCombining power-saving periods with scanning 237\u003c\/p\u003e \u003cp\u003ePreauthentication 238\u003c\/p\u003e \u003cp\u003eAreas for improvement 239\u003c\/p\u003e \u003cp\u003eScanning and roaming 239\u003c\/p\u003e \u003cp\u003eUse of status and reason codes 240\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 10 MAC management information base (M1B) 241\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eSTA management attributes 241\u003c\/p\u003e \u003cp\u003eMAC attributes 246\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 11 The physical layer (PHY) 251\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003ePHY functionality 251\u003c\/p\u003e \u003cp\u003eDirect sequence spread spectrum (DSSS) PHY 252\u003c\/p\u003e \u003cp\u003eDSSS PLCP sublayer 252\u003c\/p\u003e \u003cp\u003eData scrambling 255\u003c\/p\u003e \u003cp\u003eDSSS modulation 255\u003c\/p\u003e \u003cp\u003eBarker spreading method 256\u003c\/p\u003e \u003cp\u003eDSSS operating channels and transmit power requirements 258\u003c\/p\u003e \u003cp\u003eFrequency hopping spread spectrum (FHSS) PHY 261\u003c\/p\u003e \u003cp\u003eFHSS PLCP sublayer 261\u003c\/p\u003e \u003cp\u003ePSDU data whitening 264\u003c\/p\u003e \u003cp\u003eFHSS modulation 264\u003c\/p\u003e \u003cp\u003eFHSS channel hopping 265\u003c\/p\u003e \u003cp\u003eInfrared (IR) PHY 267\u003c\/p\u003e \u003cp\u003e1R PLCP sublayer 267\u003c\/p\u003e \u003cp\u003eIR PHY modulation method 270\u003c\/p\u003e \u003cp\u003eGeographic regulatory bodies 271\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 12 PHY extensions to IEEE 802.11 273\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eIEEE 802.1 la: Orthogonal frequency division multiplexing (OFDM) PHY 273\u003c\/p\u003e \u003cp\u003eOFDM PLCP sublayer 274\u003c\/p\u003e \u003cp\u003eIEEE 802.11 a modulation 276\u003c\/p\u003e \u003cp\u003ePLCP and data scrambler 276\u003c\/p\u003e \u003cp\u003eConvolutional encoding 276\u003c\/p\u003e \u003cp\u003eIEEE 802.1 la OFDM 277\u003c\/p\u003e \u003cp\u003eOFDM operating channels and regulatory domains 278\u003c\/p\u003e \u003cp\u003eTransmit power requirements 281\u003c\/p\u003e \u003cp\u003eGeographic regulatory bodies 283\u003c\/p\u003e \u003cp\u003eGlobalization of spectrum at 5 GHz 284\u003c\/p\u003e \u003cp\u003eIEEE 802.1 lb: 2.4 high-rate direct sequence spread spectrum (HR\/DSSS) PHY 285\u003c\/p\u003e \u003cp\u003eHR\/DSSS PLCP sublayer 285\u003c\/p\u003e \u003cp\u003eHigh-rate data scrambling 288\u003c\/p\u003e \u003cp\u003e1EEE 802.1 1 high-rate operating channels 289\u003c\/p\u003e \u003cp\u003e1EEE 802.1 1 DSSS high-rate modulation and data rates 290\u003c\/p\u003e \u003cp\u003eComplementary code keying (CCK) modulation 290\u003c\/p\u003e \u003cp\u003eDSSS packet binary convolutional coding (PBCC) 292\u003c\/p\u003e \u003cp\u003eFrequency-hopping spread spectrum (FHSS) interoperability 294\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 13 IEEE 802.11j operation in Japan at 4.9 GHz and 5 GHz 295\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eExpanded Country information element 295\u003c\/p\u003e \u003cp\u003eMandatory and optional modes of operation 299\u003c\/p\u003e \u003cp\u003ePLCP header, Signal field, and Rate subfield 300\u003c\/p\u003e \u003cp\u003eExtended frequency bands and transmit RF power levels 302\u003c\/p\u003e \u003cp\u003eTransmit mask and adjacent channel interference 304\u003c\/p\u003e \u003cp\u003eSpurious emissions 306\u003c\/p\u003e \u003cp\u003eRegulatory domain references 307\u003c\/p\u003e \u003cp\u003eNumber of frequency channels and data rates 308\u003c\/p\u003e \u003cp\u003eReceiver sensitivity, CCA, and slot time 309\u003c\/p\u003e \u003cp\u003eTransmitter error vector magnitude (EVM) 311\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 14 IEEE 802.11g higher data rates in 2.4 GHz frequency band 313\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eNetwork deployment and user scenario 313\u003c\/p\u003e \u003cp\u003eMandatory and optional modes of operation 314\u003c\/p\u003e \u003cp\u003eOptional modes of operation 316\u003c\/p\u003e \u003cp\u003ePPDU formats 319\u003c\/p\u003e \u003cp\u003eOperating channels 321\u003c\/p\u003e \u003cp\u003eOperation of lEEE 802.llgCSMA\/CA and CCA 323\u003c\/p\u003e \u003cp\u003eKey system specifications 324\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 15 IEEE 802.1 In higher data rates beyond 54 Mbit\/s 327\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eChannel bonding 328\u003c\/p\u003e \u003cp\u003eHigher order modulation 329\u003c\/p\u003e \u003cp\u003eMultiple input multiple output (MIMO) 329\u003c\/p\u003e \u003cp\u003e\u003cb\u003eChapter 16 System design considerations for IEEE 802.11 WLANs 333\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eThe Medium 333\u003c\/p\u003e \u003cp\u003eMultipath 334\u003c\/p\u003e \u003cp\u003ePath loss in a WLAN 337\u003c\/p\u003e \u003cp\u003eEs\/No vs BER performance 339\u003c\/p\u003e \u003cp\u003eData rate vs aggregate throughput 341\u003c\/p\u003e \u003cp\u003eWLAN installation and site survey 341\u003c\/p\u003e \u003cp\u003eInterference in the 2.4 GHz frequency band 342\u003c\/p\u003e \u003cp\u003eAntenna diversity 343\u003c\/p\u003e \u003cp\u003ePower management defined 344\u003c\/p\u003e \u003cp\u003eGlossary 349\u003c\/p\u003e \u003cp\u003eIndex 353\u003c\/p\u003e  \u003cb\u003eBob O'Hara\u003c\/b\u003e is a co-founder of Airespace, a venture-funded startup company that is leading the IEEE 802.11 industry into the second stage of wireless local area network (WLAN) evolution. He is actively involved in the development of networking, telecommunications, and computing standards and products. His areas of expertise are network and communication protocols and their implementation, operating systems, system specification and integration, standards development, cryptography and its application, strategy development, and product definition. Mr. O'Hara has been involved with the development of the IEEE 802.11 WLAN standard since 1992. He was the technical editor of that standard and chairman of the revisions and regulatory extensions tasks groups. He is currently chairman of the maintenance and task group. In 2004, he was selected of one of the fifty most powerful people in networking by \u003ci\u003eNetwork World\u003c\/i\u003e.  \u003cp\u003e\u003cb\u003eAl Petrick\u003c\/b\u003e is vice president of marketing and business development at WiDeFi, a fabless semiconductor company developing 802.11 WiFi\u003csup\u003e®\u003c\/sup\u003e semiconductors for the wireless consumer electronics market. Mr. Petrick's experience includes over 23 years of combined marketing and systems engineering in wireless communications and semiconductor technology. Prior to WiDeFi, he held executive management marketing and business development positions at Icefyre and Intersil. At Intersil, now Conexant, formally Harris Semiconductor, he pioneered the PRISM WLAN chipset from inception into a successful Wi-Fi product line. Mr. Petrick serves as vice chairman of the IEEE 802.11 WLAN Working Group. He has published various marketing and technical papers on wireless communications for leading wireless trade publications, marketing analysts, and financial analysts. Mr Petrick co-authored with Bob O'Hara  the first edition of the \u003ci\u003eIEEE 802.11 Handbook: A Designer's Companion\u003c\/i\u003e. He serves on a number of advisory boards for Wi-Fi product companies.\u003c\/p\u003e  \u003cp\u003e\u003cb\u003eIEEE Standards Wireless Networks Series\u003c\/b\u003e \u003c\/p\u003e\u003cp\u003e\u003cb\u003eIEEE 802.11\u003csup\u003e\u003csmall\u003e™\u003c\/small\u003e\u003c\/sup\u003e Handbook\u003c\/b\u003e \u003ci\u003eA Designer's Companion, Second Edition\u003c\/i\u003e  \u003c\/p\u003e\u003cp\u003e\"Wireless 802.11 dual band 2.4 GHz-5 GHz networks overlaid with Quality of Service and robust security have become the choice for carrier grade voice over IP networks for the enterprise and consumer services market. The IEEE 802.11 Handbook: A Designer's Companion by Bob O'Hara and Al Petrick, 2nd Edition, contains a wealth of extremely useful technical information for designing standards based Wi-Fi™ VoIP products and networks. It's a valuable resource tool for every wireless engineer.\" \u003ci\u003e—Harry Worstell, Researcher, AT\u0026amp;T Labs\u003c\/i\u003e \u003c\/p\u003e\u003cp\u003e\"Wireless access networks are moving from a useful to a must-have imperative by CIOs and knowledge workers worldwide, catalyzed by the immediate and obvious productivity benefits of this technology, as well as the near-universal appeal of standards-based IEEE 802.11 networks. Bob O'Hara and Al Petrick's Designer's Companion plays a pivotal role for all technologists building to the standard or just those who want to understand it better. It's a must-read for everyone working with WLAN technology.\" \u003ci\u003e—Brett Galloway, President and Chief Executive Officer, Airespace\u003c\/i\u003e \u003c\/p\u003e\u003cp\u003e\"This book belongs on the desk of anyone involved with wireless LAN technologies and products. It's a vital reference to one of the most important elements in networking today.\" \u003ci\u003e—Craig J. Mathias, Farpoint Group\u003c\/i\u003e \u003c\/p\u003e\u003cp\u003e\"The amazing success of IEEE 802.11 adoptions is visible in the home, the enterprise, and other market segments. Such market growth and associated user experience has much to do with the fact 802.11 is a global Standard. I find that Bob O'Hara and Al Petrick's Designer's Companion is an excellent reference for those who are interested in learning about the Standard and its features.\" \u003ci\u003e—Dr. Amer Hassan, Architect, Windows Networking and Device Technologies, Microsoft\u003c\/i\u003e\u003c\/p\u003e","brand":"Standards Information Network","offers":[{"title":"Default Title","offer_id":47989399748837,"sku":"NP9780738144498","price":84.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1842\/7735\/files\/9780738144498.jpg?v=1761783961","url":"https:\/\/k12savings.com\/products\/ieee-802-11-handbook-isbn-9780738144498","provider":"K12savings","version":"1.0","type":"link"}