【US20190261232A1】来自WLAN至另一无线电接入网的网络得到指示的移交【专利】
WLAN协议
WLAN协议WLAN（Wireless Local Area Network）是指无线局域网，是一种无线通信技术，用于连接各种无线设备，如笔记本电脑、智能手机、平板电脑等，以实现局域网内的数据传输和共享资源。
WLAN协议是指无线局域网中使用的通信协议，它规定了无线设备之间如何进行通信、数据传输和网络管理。
WLAN协议的发展和演变对无线局域网的性能、覆盖范围和安全性都有着重要的影响。
WLAN协议的发展历程可以分为几个阶段。
最早的无线局域网技术是基于IEEE 802.11标准的，它规定了无线局域网的物理层和数据链路层的技术规范，包括无线信道的分配、数据传输的方式、帧格式等。
随着技术的发展，IEEE 802.11标准也不断进行了更新和完善，出现了802.11a、802.11b、802.11g、802.11n、802.11ac等多个版本，每个版本都在提高无线局域网的速度、稳定性和覆盖范围方面有所改进。
除了IEEE 802.11标准之外，WLAN协议还涉及到一些其他的技术规范和协议。
例如，WPA（Wi-Fi Protected Access）和WPA2是用于无线局域网的安全协议，用于保护无线网络的安全性，防止未经授权的用户接入网络。
此外，还有一些用于提高无线网络性能的协议，如802.11e用于增强多媒体传输的QoS（Quality of Service），802.11i用于加强网络的安全性等。
随着移动互联网的快速发展，WLAN协议也在不断演进和完善。
未来，随着5G技术的商用和普及，无线局域网将会迎来新的发展机遇。
5G技术的高速、低时延、大连接等特性将对WLAN协议提出新的挑战和需求，无线局域网将更加智能化、高效化和安全化。
总的来说，WLAN协议是无线局域网的基础技术，它的发展和演变对无线局域网的性能和安全性都有着重要的影响。
随着移动互联网的快速发展和新技术的不断涌现，WLAN协议将会不断进行更新和完善，以满足人们对无线通信的需求。
无线通信技术考核试卷
15.以下哪些因素可能影响无线通信的信号覆盖范围？（）
A.信号频率
B.发射功率
C.天线高度
D.所有上述
第三部分判断题（本题共10小题，每题2分，共20分，正确的请在答题括号中画√，错误的画×）
1.无线通信技术中，信号传输速率与频率成正比关系。（）
2.在无线通信中，WEP是一种非常安全的加密协议。（）
C. WPA2
D. HTTPS
( )
7.在无线通信中，下列哪个术语指的是无线电波在传播过程中遇到障碍物时的反射现象？（）
A.反射
B.折射
C.散射
D.透射
( )
8.以下哪个城市是全球首个实现5G商用的城市？（）
A.北京
B.上海
C.深圳
D.首尔
( )
9.下列哪种无线通信技术采用正交频分复用技术？（）
A. 3G
B.多址接入
C.调制解调
D.信号干扰
13.以下哪个技术主要用于提高无线通信的频谱效率？（）
A. MIMO
B. CDMA
C. FHSS
D. DSSS
14.在无线通信中，以下哪个设备用于将模拟信号转换为数字信号？（）
A.调制器
B.解调器
C.编码器
D.译码器
15.以下哪项是5G无线通信技术的主要特点之一？（)
B. CDMA
C. TDMA
D. FDMA
8.在无线通信系统中，哪个部件负责无线信号的发送和接收？（）
A.调制器
B.解调器
C.天线
D.电缆
9.以下哪个单位用于衡量无线信号的强度？（）
A. mW
B. dBm
C. V/m
D. W
HP Color LaserJet Enterprise MFP M776用户指南说明书
Legal informationCopyright and License© Copyright 2019 HP Development Company, L.P.Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowedunder the copyright laws.The information contained herein is subject to change without notice.The only warranties for HP products and services are set forth in the express warranty statementsaccompanying such products and services. Nothing herein should be construed as constituting anadditional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.Edition 1, 10/2019Trademark CreditsAdobe®, Adobe Photoshop®, Acrobat®, and PostScript® are trademarks of Adobe Systems Incorporated.Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries.macOS is a trademark of Apple Inc., registered in the U.S. and other countries.AirPrint is a trademark of Apple Inc., registered in the U.S. and other countries.Google™ is a trademark of Google Inc.Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of MicrosoftCorporation.UNIX® is a registered trademark of The Open Group.iiiT able of contents1 Printer overview (1)Warning icons (1)Potential shock hazard (2)Printer views (2)Printer front view (2)Printer back view (4)Interface ports (4)Control-panel view (5)How to use the touchscreen control panel (7)Printer specifications (8)T echnical specifications (8)Supported operating systems (11)Mobile printing solutions (12)Printer dimensions (13)Power consumption, electrical specifications, and acoustic emissions (15)Operating-environment range (15)Printer hardware setup and software installation (16)2 Paper trays (17)Introduction (17)Load paper to Tray 1 (multipurpose tray) (17)Load Tray 1 (multipurpose tray) (18)Tray 1 paper orientation (19)Use alternative letterhead mode (24)Enable Alternative Letterhead Mode by using the printer control-panel menus (24)Load paper to Tray 2 (24)Load Tray 2 (24)Tray 2 paper orientation (26)Use alternative letterhead mode (29)Enable Alternative Letterhead Mode by using the printer control-panel menus (29)Load paper to the 550-sheet paper tray (30)Load paper to the 550-sheet paper tray (30)550-sheet paper tray paper orientation (32)Use alternative letterhead mode (35)Enable Alternative Letterhead Mode by using the printer control-panel menus (35)ivLoad paper to the 2 x 550-sheet paper trays (36)Load paper to the 2 x 550-sheet paper trays (36)2 x 550-sheet paper tray paper orientation (38)Use alternative letterhead mode (41)Enable Alternative Letterhead Mode by using the printer control-panel menus (41)Load paper to the 2,700-sheet high-capacity input paper trays (41)Load paper to the 2,700-sheet high-capacity input paper trays (41)2,700-sheet HCI paper tray paper orientation (43)Use alternative letterhead mode (45)Enable Alternative Letterhead Mode by using the printer control-panel menus (45)Load and print envelopes (46)Print envelopes (46)Envelope orientation (46)Load and print labels (47)Manually feed labels (47)Label orientation (48)3 Supplies, accessories, and parts (49)Order supplies, accessories, and parts (49)Ordering (49)Supplies and accessories (50)Maintenance/long-life consumables (51)Customer self-repair parts (51)Dynamic security (52)Configure the HP toner-cartridge-protection supply settings (53)Introduction (53)Enable or disable the Cartridge Policy feature (53)Use the printer control panel to enable the Cartridge Policy feature (54)Use the printer control panel to disable the Cartridge Policy feature (54)Use the HP Embedded Web Server (EWS) to enable the Cartridge Policy feature (54)Use the HP Embedded Web Server (EWS) to disable the Cartridge Policy feature (55)Troubleshoot Cartridge Policy control panel error messages (55)Enable or disable the Cartridge Protection feature (55)Use the printer control panel to enable the Cartridge Protection feature (56)Use the printer control panel to disable the Cartridge Protection feature (56)Use the HP Embedded Web Server (EWS) to enable the Cartridge Protection feature (56)Use the HP Embedded Web Server (EWS) to disable the Cartridge Protection feature (57)Troubleshoot Cartridge Protection control panel error messages (57)Replace the toner cartridges (58)T oner-cartridge information (58)Remove and replace the cartridges (59)Replace the imaging drums (62)Imaging drum information (62)Remove and replace the imaging drums (63)Replace the toner-collection unit (66)T oner-collection unit information (66)vRemove and replace the toner-collection unit (67)Replace the staple cartridge (M776zs model only) (70)Staple cartridge information (70)Remove and replace the staple cartridge (71)4 Print (73)Print tasks (Windows) (73)How to print (Windows) (73)Automatically print on both sides (Windows) (74)Manually print on both sides (Windows) (74)Print multiple pages per sheet (Windows) (75)Select the paper type (Windows) (75)Additional print tasks (76)Print tasks (macOS) (77)How to print (macOS) (77)Automatically print on both sides (macOS) (77)Manually print on both sides (macOS) (77)Print multiple pages per sheet (macOS) (78)Select the paper type (macOS) (78)Additional print tasks (79)Store print jobs on the printer to print later or print privately (79)Introduction (79)Create a stored job (Windows) (79)Create a stored job (macOS) (80)Print a stored job (81)Delete a stored job (81)Delete a job that is stored on the printer (81)Change the job storage limit (82)Information sent to printer for Job Accounting purposes (82)Mobile printing (82)Introduction (82)Wi-Fi, Wi-Fi Direct Print, NFC, and BLE printing (82)Enable wireless printing (83)Change the Wi-Fi Direct name (83)HP ePrint via email (83)AirPrint (84)Android embedded printing (85)Print from a USB flash drive (85)Enable the USB port for printing (85)Method one: Enable the USB port from the printer control panel (85)Method two: Enable the USB port from the HP Embedded Web Server (network-connectedprinters only) (85)Print USB documents (86)Print using high-speed USB 2.0 port (wired) (86)Method one: Enable the high-speed USB 2.0 port from the printer control panel menus (86)Method two: Enable the high-speed USB 2.0 port from the HP Embedded Web Server (network-connected printers only) (87)vi5 Copy (88)Make a copy (88)Copy on both sides (duplex) (90)Additional copy tasks (92)6 Scan (93)Set up Scan to Email (93)Introduction (93)Before you begin (93)Step one: Access the HP Embedded Web Server (EWS) (94)Step two: Configure the Network Identification settings (95)Step three: Configure the Send to Email feature (96)Method one: Basic configuration using the Email Setup Wizard (96)Method two: Advanced configuration using the Email Setup (100)Step four: Configure the Quick Sets (optional) (104)Step five: Set up Send to Email to use Office 365 Outlook (optional) (105)Introduction (105)Configure the outgoing email server (SMTP) to send an email from an Office 365 Outlookaccount (105)Set up Scan to Network Folder (108)Introduction (108)Before you begin (108)Step one: Access the HP Embedded Web Server (EWS) (108)Step two: Set up Scan to Network Folder (109)Method one: Use the Scan to Network Folder Wizard (109)Method two: Use Scan to Network Folder Setup (110)Step one: Begin the configuration (110)Step two: Configure the Scan to Network Folder settings (111)Step three: Complete the configuration (118)Set up Scan to SharePoint (118)Introduction (118)Before you begin (118)Step one: Access the HP Embedded Web Server (EWS) (118)Step two: Enable Scan to SharePoint and create a Scan to SharePoint Quick Set (119)Scan a file directly to a SharePoint site (121)Quick Set scan settings and options for Scan to SharePoint (122)Set up Scan to USB Drive (123)Introduction (124)Step one: Access the HP Embedded Web Server (EWS) (124)Step two: Enable Scan to USB Drive (124)Step three: Configure the Quick Sets (optional) (125)Default scan settings for Scan to USB Drive setup (126)Default file settings for Save to USB setup (126)Scan to email (127)Introduction (127)Scan to email (127)Scan to job storage (129)viiIntroduction (129)Scan to job storage on the printer (130)Print from job storage on the printer (132)Scan to network folder (132)Introduction (132)Scan to network folder (132)Scan to SharePoint (134)Introduction (134)Scan to SharePoint (134)Scan to USB drive (136)Introduction (136)Scan to USB drive (136)Use HP JetAdvantage business solutions (138)Additional scan tasks (138)7 Fax (140)Set up fax (140)Introduction (140)Set up fax by using the printer control panel (140)Change fax configurations (141)Fax dialing settings (141)General fax send settings (142)Fax receive settings (143)Send a fax (144)Additional fax tasks (146)8 Manage the printer (147)Advanced configuration with the HP Embedded Web Server (EWS) (147)Introduction (147)How to access the HP Embedded Web Server (EWS) (148)HP Embedded Web Server features (149)Information tab (149)General tab (149)Copy/Print tab (150)Scan/Digital Send tab (151)Fax tab (152)Supplies tab (153)Troubleshooting tab (153)Security tab (153)HP Web Services tab (154)Networking tab (154)Other Links list (156)Configure IP network settings (157)Printer sharing disclaimer (157)View or change network settings (157)Rename the printer on a network (157)viiiManually configure IPv4 TCP/IP parameters from the control panel (158)Manually configure IPv6 TCP/IP parameters from the control panel (158)Link speed and duplex settings (159)Printer security features (160)Introduction (160)Security statements (160)Assign an administrator password (160)Use the HP Embedded Web Server (EWS) to set the password (160)Provide user access credentials at the printer control panel (161)IP Security (161)Encryption support: HP High Performance Secure Hard Disks (161)Lock the formatter (161)Energy-conservation settings (161)Set the sleep timer and configure the printer to use 1 watt or less of power (161)Set the sleep schedule (162)Set the idle settings (162)HP Web Jetadmin (163)Software and firmware updates (163)9 Solve problems (164)Customer support (164)Control panel help system (165)Reset factory settings (165)Introduction (165)Method one: Reset factory settings from the printer control panel (165)Method two: Reset factory settings from the HP Embedded Web Server (network-connectedprinters only) (166)A “Cartridge is low” or “Cartridge is very low” message displays on the printer control panel (166)Change the “Very Low” settings (166)Change the “Very Low” settings at the control panel (166)For printers with fax capability (167)Order supplies (167)Printer does not pick up paper or misfeeds (167)Introduction (167)The printer does not pick up paper (167)The printer picks up multiple sheets of paper (171)The document feeder jams, skews, or picks up multiple sheets of paper (174)Clear paper jams (174)Introduction (174)Paper jam locations (174)Auto-navigation for clearing paper jams (175)Experiencing frequent or recurring paper jams? (175)Clear paper jams in the document feeder - 31.13.yz (176)Clear paper jams in Tray 1 (13.A1) (177)Clear paper jams in Tray 2 (13.A2) (182)Clear paper jams in the fuser (13.B9, 13.B2, 13.FF) (188)ixClear paper jams in the duplex area (13.D3) (194)Clear paper jams in the 550-sheet trays (13.A3, 13.A4) (199)Clear paper jams in the 2 x 550 paper trays (13.A4, 13.A5) (206)Clear paper jams in the 2,700-sheet high-capacity input paper trays (13.A3, 13.A4, 13.A5, 13.A7) (213)Resolving color print quality problems (220)Introduction (220)Troubleshoot print quality (221)Update the printer firmware (221)Print from a different software program (221)Check the paper-type setting for the print job (221)Check the paper type setting on the printer (221)Check the paper type setting (Windows) (221)Check the paper type setting (macOS) (222)Check toner-cartridge status (222)Step one: Print the Supplies Status Page (222)Step two: Check supplies status (222)Print a cleaning page (222)Visually inspect the toner cartridge or cartridges (223)Check paper and the printing environment (223)Step one: Use paper that meets HP specifications (223)Step two: Check the environment (223)Step three: Set the individual tray alignment (224)Try a different print driver (224)Troubleshoot color quality (225)Calibrate the printer to align the colors (225)Troubleshoot image defects (225)Improve copy image quality (233)Check the scanner glass for dirt and smudges (233)Calibrate the scanner (234)Check the paper settings (235)Check the paper selection options (235)Check the image-adjustment settings (235)Optimize copy quality for text or pictures (236)Edge-to-edge copying (236)Improve scan image quality (236)Check the scanner glass for dirt and smudges (237)Check the resolution settings (238)Check the color settings (238)Check the image-adjustment settings (239)Optimize scan quality for text or pictures (239)Check the output-quality settings (240)Improve fax image quality (240)Check the scanner glass for dirt and smudges (240)Check the send-fax resolution settings (242)Check the image-adjustment settings (242)Optimize fax quality for text or pictures (242)Check the error-correction setting (243)xSend to a different fax machine (243)Check the sender's fax machine (243)Solve wired network problems (244)Introduction (244)Poor physical connection (244)The computer is unable to communicate with the printer (244)The printer is using incorrect link and duplex settings for the network (245)New software programs might be causing compatibility problems (245)The computer or workstation might be set up incorrectly (245)The printer is disabled, or other network settings are incorrect (245)Solve wireless network problems (245)Introduction (245)Wireless connectivity checklist (245)The printer does not print after the wireless configuration completes (246)The printer does not print, and the computer has a third-party firewall installed (246)The wireless connection does not work after moving the wireless router or printer (247)Cannot connect more computers to the wireless printer (247)The wireless printer loses communication when connected to a VPN (247)The network does not appear in the wireless networks list (247)The wireless network is not functioning (247)Reduce interference on a wireless network (248)Solve fax problems (248)Checklist for solving fax problems (248)What type of phone line are you using? (249)Are you using a surge-protection device? (249)Are you using a phone company voice-messaging service or an answering machine? (249)Does your phone line have a call-waiting feature? (249)Check fax accessory status (249)General fax problems (250)The fax failed to send (250)No fax address book button displays (250)Not able to locate the Fax settings in HP Web Jetadmin (250)The header is appended to the top of the page when the overlay option is enabled (251)A mix of names and numbers is in the recipients box (251)A one-page fax prints as two pages (251)A document stops in the document feeder in the middle of faxing (251)The volume for sounds coming from the fax accessory is too high or too low (251)Index (252)xiPrinter overview1Review the location of features on the printer, the physical and technical specifications of the printer,and where to locate setup information.For video assistance, see /videos/LaserJet.The following information is correct at the time of publication. For current information, see /support/colorljM776MFP.For more information:HP's all-inclusive help for the printer includes the following information:●Install and configure●Learn and use●Solve problems●Download software and firmware updates●Join support forums●Find warranty and regulatory informationWarning iconsUse caution if you see a warning icon on your HP printer, as indicated in the icon definitions.●Caution: Electric shock●Caution: Hot surface●Caution: Keep body parts away from moving partsPrinter overview1●Caution: Sharp edge in close proximity●WarningPotential shock hazardReview this important safety information.●Read and understand these safety statements to avoid an electrical shock hazard.●Always follow basic safety precautions when using this product to reduce risk of injury from fire orelectric shock.●Read and understand all instructions in the user guide.●Observe all warnings and instructions marked on the product.●Use only a grounded electrical outlet when connecting the product to a power source. If you do notknow whether the outlet is grounded, check with a qualified electrician.●Do not touch the contacts on any of the sockets on the product. Replace damaged cordsimmediately.●Unplug this product from wall outlets before cleaning.●Do not install or use this product near water or when you are wet.●Install the product securely on a stable surface.●Install the product in a protected location where no one can step on or trip over the power cord.Printer viewsIdentify certain parts of the printer and the control panel.Printer front viewLocate features on the front of the printer.2Chapter 1 Printer overviewPrinter front view3Printer back viewLocate features on the back of the printer.Interface portsLocate the interface ports on the printer formatter. 4Chapter 1 Printer overviewControl-panel viewThe control panel provides access to the printer features and indicates the current status of the printer.NOTE:Tilt the control panel for easier viewing.The Home screen provides access to the printer features and indicates the current status of the printer.screens.NOTE:The features that appear on the Home screen can vary, depending on the printerconfiguration.Control-panel view5Figure 1-1Control-panel view?i 12:42 PM6Chapter 1 Printer overviewHow to use the touchscreen control panelPerform the following actions to use the printer touchscreen control panel.T ouchT ouch an item on the screen to select that item or open that menu. Also, when scrolling T ouch the Settings icon to open the Settings app.How to use the touchscreen control panel 7SwipeT ouch the screen and then move your finger horizontally to scroll the screen sideways.Swipe until the Settings app displays.Printer specificationsDetermine the specifications for your printer model.IMPORTANT:The following specifications are correct at the time of publication, but they are subject to change. For current information, see /support/colorljM776MFP .T echnical specificationsReview the printer technical specifications.Product numbers for each model ●M776dn - #T3U55A ●Flow M776z - #3WT91A ●Flow M776zs - #T3U56APaper handling specificationsPaper handling features Tray 1 (100-sheet capacity)Included Included Included Tray 2 (550-sheet capacity)IncludedIncludedIncluded8Chapter 1 Printer overview550-sheet paper trayOptional Included Not included NOTE:The M776dn models accept one optional550-sheet tray.Optional Included Included2 x 550-sheet paper tray and standNOTE:The M776dn models accept one optional550-sheet tray that may be installed on top of thestand.Optional Not included Not included2,700-sheet high-capacity input (HCI) paper trayand standNOTE:The M776dn models accept one optional550-sheet tray that may be installed on top of theoptional printer stand.Printer standOptional Not included Not included NOTE:The M776dn models accept one optional550-sheet tray that may be installed on top of theoptional printer stand.Inner finisher accessory Not included Not included Included Automatic duplex printing Included IncludedIncludedIncluded Included Included10/100/1000 Ethernet LAN connection with IPv4and IPv6Hi-Speed USB 2.0Included Included IncludedIncluded Included IncludedEasy-access USB port for printing from a USBflash drive or upgrading the firmwareIncluded Included Included Hardware Integration Pocket for connectingaccessory and third-party devicesHP Internal USB Ports Optional Optional OptionalOptional Optional OptionalHP Jetdirect 2900nw Print Server accessory forWi-Fi connectivity and an additional Ethernet portOptional IncludedIncludedHP Jetdirect 3100w accessory for Wi-Fi, BLE, NFC,and proximity badge readingPrints 45 pages per minute (ppm) on Letter-sizepaper and 46 ppm on A4-size paperEasy-access USB printing for printing from a USBIncluded Included Includedflash driveT echnical specifications9Included Included Included Store jobs in the printer memory to print later orprint privatelyScans 100 pages per minute (ppm) on A4 andIncluded Included Included letter-size paper one-sidedIncluded Included Included 200-page document feeder with dual-headscanning for single-pass duplex copying andscanningNot included Included Included HP EveryPage T echnologies including ultrasonicmulti-feed detectionNot included Included Included Embedded optical character recognition (OCR)provides the ability to convert printed pages intotext that can be edited or searched using acomputerIncluded Included Included SMART Label feature provides paper-edgedetection for automatic page croppingIncluded Included Included Automatic page orientation for pages that haveat least 100 characters of textIncluded Automatic tone adjustment sets contrast,Included Includedbrightness, and background removal for eachpageIncluded Included Includedfolders on a networkIncludedSend documents to SharePoint®Included IncludedIncluded Included Included NOTE:Memory reported on the configurationpage will change from 2.5 GB to 3 GB with theoptional 1 GB SODIMM installed.Mass storage: 500 GB hard disk drive Included Included IncludedSecurity: HP Trusted Platform Module (TPM)Included Included IncludedT ouchscreen control panel Included Included IncludedRetractable keyboard Not included Included Included 10Chapter 1 Printer overviewFax Optional Included IncludedSupported operating systemsUse the following information to ensure printer compatibility with your computer operating system.Linux: For information and print drivers for Linux, go to /go/linuxprinting.UNIX: For information and print drivers for UNIX®, go to /go/unixmodelscripts.The following information applies to the printer-specific Windows HP PCL 6 print drivers, HP print driversfor macOS, and to the software installer.Windows: Download HP Easy Start from /LaserJet to install the HP print driver. Or, go tothe printer-support website for this printer: /support/colorljM776MFP to download the printdriver or the software installer to install the HP print driver.macOS: Mac computers are supported with this printer. Download HP Easy Start either from /LaserJet or from the Printer Support page, and then use HP Easy Start to install the HP print driver.1.Go to /LaserJet.2.Follow the steps provided to download the printer software.Windows 7, 32-bit and 64-bit The “HP PCL 6” printer-specific print driver is installed for this operating system aspart of the software installation.Windows 8.1, 32-bit and 64-bit The “HP PCL-6” V4 printer-specific print driver is installed for this operating systemas part of the software installation.Windows 10, 32-bit and 64-bit The “HP PCL-6” V4 printer-specific print driver is installed for this operating systemas part of the software installation.Windows Server 2008 R2, SP 1, 64-bit The PCL 6 printer-specific print driver is available for download from the printer-support website. Download the driver, and then use the Microsoft Add Printer tool toinstall it.Windows Server 2012, 64-bit The PCL 6 printer-specific print driver is available for download from the printer-support website. Download the driver, and then use the Microsoft Add Printer tool toinstall it.Windows Server 2012 R2, 64-bit The PCL 6 printer-specific print driver is available for download from the printer-support website. Download the driver, and then use the Microsoft Add Printer tool toinstall it.Windows Server 2016, 64-bit The PCL 6 printer-specific print driver is available for download from the printer-support website. Download the driver, and then use the Microsoft Add Printer tool toinstall it.Windows Server 2019, 64-bit The PCL 6 printer-specific print driver is available for download from the printer-support website. Download the driver, and then use the Microsoft Add Printer tool toinstall it.Supported operating systems11macOS 10.13 High Sierra, macOS 10.14 MojaveDownload HP Easy Start from /LaserJet , and then use it to install the print driver.NOTE:Supported operating systems can change.NOTE:For a current list of supported operating systems and HP’s all-inclusive help for the printer, go to /support/colorljM776MFP .NOTE:For details on client and server operating systems and for HP UPD driver support for this printer, go to /go/upd . Under Additional information , click Specifications .●Internet connection●Dedicated USB 1.1 or 2.0 connection or a network connection● 2 GB of available hard-disk space ●1 GB RAM (32-bit) or2 GB RAM (64-bit)●Internet connection●Dedicated USB 1.1 or 2.0 connection or a network connection●1.5 GB of available hard-disk spaceNOTE:The Windows software installer installs the HP Smart Device Agent Base service. The file size is less than 100 kb. Its only function is to check for printers connected via USB hourly. No data is collected. If a USB printer is found, it then tries to locate a JetAdvantage Management Connector (JAMc) instance on the network. If a JAMc is found, the HP Smart Device Agent Base is securelyupgraded to a full Smart Device Agent from JAMc, which will then allow printed pages to be accounted for in a Managed Print Services (MPS) account. The driver-only web packs downloaded from for the printer and installed through the Add Printer wizard do not install this service.T o uninstall the service, open the Control Panel , select Programs or Programs and Features , and then select Add/Remove Programs or Uninstall a Programto remove the service. The file name isHPSmartDeviceAgentBase.Mobile printing solutionsHP offers multiple mobile printing solutions to enable easy printing to an HP printer from a laptop, tablet, smartphone, or other mobile device.T o see the full list and to determine the best choice, go to /go/MobilePrinting .NOTE:Update the printer firmware to ensure all mobile printing capabilities are supported.●Wi-Fi Direct (wireless models only, with HP Jetdirect 3100w BLE/NFC/Wireless accessory installed)●HP ePrint via email (Requires HP Web Services to be enabled and the printer to be registered with HP Connected)●HP Smart app ●Google Cloud Print12Chapter 1 Printer overview。
wifi协议详解
wifi协议详解Wi-Fi是一种无线局域网技术，它基于IEEE 802.11标准，并由Wi-Fi联盟负责推广和认证。
Wi-Fi协议经过多年的发展，不断更新和改进，已成为现代生活中不可或缺的一部分。
本文将对Wi-Fi协议进行详细解析。
首先，Wi-Fi协议使用的频段主要有2.4GHz和5GHz两种。
2.4GHz频段拥有更远的传输距离，但同时会有更多的干扰。
而5GHz频段具有更大的带宽和更少的干扰，但传输距离相对较短。
根据具体的应用场景，可以选择不同的频段。
其次，Wi-Fi协议主要涉及到两个主要层面的协议：物理层和MAC层。
物理层负责无线信号的传输和解调，而MAC层负责无线设备的连接管理和数据传输控制。
在物理层方面，Wi-Fi协议使用了多种调制和编码技术，如OFDM（正交频分复用）和MIMO（多天线技术），以提供更高的传输速率和更可靠的信号传输。
此外，Wi-Fi协议还支持自适应调制和编码技术，以根据信道质量自动调整传输速率。
在MAC层方面，Wi-Fi协议使用了CSMA/CA（载波监听多路访问/碰撞避免）机制来避免多个设备同时发送数据时产生的碰撞。
具体而言，设备在发送数据前会先监听信道，如果信道处于空闲状态，设备就可以发送数据；如果信道处于繁忙状态，设备会等待一段时间再次尝试发送数据。
此外，Wi-Fi协议还对连接管理和安全性进行了详细规定。
设备之间的连接建立过程分为两个阶段：关联和认证。
关联是设备和接入点之间的物理连接建立过程，而认证是设备向接入点提供凭据以获取访问权限的过程。
一旦连接建立成功，数据传输过程就会被加密，以确保数据的安全性。
最后，Wi-Fi协议还支持多种网络拓扑结构，如基础设施模式和Ad-hoc模式。
在基础设施模式中，设备通过接入点连接到有线网络，实现无线与有线网络的互联互通；而在Ad-hoc模式中，设备可以直接建立点对点的连接，构建自组织的无线网络。
总的来说，Wi-Fi协议是一种成熟而广泛应用的无线局域网技术，在现代社会中发挥着重要作用。
无线接入技术名词解释
无线接入技术名词解释
无线接入技术是指通过无线通信手段实现终端设备与网络之间的连接和通信的技术。
它使得用户可以通过无线方式接入网络，无需使用传统的有线连接方式。
以下是几种常见的无线接入技术的解释：
1. Wi-Fi（无线局域网）：是一种基于无线电波技术的局域网技术，通过无线路由器和无线网卡实现终端设备与网络的连接和数据传输。
2. 4G/5G（第四/五代移动通信技术）：是一种基于蜂窝网络的移动通信技术，通过移动基站和移动设备之间的无线通信，实现高速的移动数据传输和互联网接入。
3. Bluetooth（蓝牙）：是一种短距离无线通信技术，用于在个人电子设备之间进行数据传输和音频通信，例如连接手机和耳机、键盘等外部设备。
4. NFC（近场通信）：是一种短距离无线通信技术，通过将两个设备靠近，实现快速的数据传输和交换。
常用于移动支付、门禁系统等场景。
5. ZigBee（低功耗无线个人局域网）：是一种面向低功耗、低速率的无线通信技术，主要应用于物联网领域，例如智能家居、智能传感器等设备之间的通信。
这些无线接入技术在不同场景和应用中具有各自的优势和特点，可以根据需求选择适合的技术进行无线接入。
WLAN短信指令
1 短信指令集1.1 业务开通普通用户发送：KTWLAN（大小写均可）到10086；KT为“开通”密码的首字母。
开户成功，返回短信通知：“欢迎使用中国移动WLAN业务，帐号：1XXXXXXXX，密码：XXXXXX，如需帮助请拨打10086”；开户不成功，返回短信通知：“对不起，开户不成功，请稍后再试或拨打10086咨询”。
当客户已经开通普通WLAN业务，再次申请开通普通WLAN业务时，返回短信通知：“您好，在此之前您已申请开通了WLAN业务，如忘记密码请发送“CZWLANMM”到10086或者拨打10086咨询”。
当申请开通客户处于非正常状态时，返回短信通知：“对不起，申请不成功，请稍后重试或拨打10086咨询”。
1.2 密码修改高校用户发送：XGEDUMM（大小写均可）□原密码□新密码（密码不区分大小写，长度为6位）至10086；XGMM为“修改密码”拼音的首字母，□表示空格。
密码修改成功，返回短信通知：“您已成功修改高校WLAN密码，新密码为：XXXXXX，请注意保管。
”密码修改不成功，返回短信通知：“对不起，修改密码不成功，请核实原密码是否正确，可稍后再试或拨打10086咨询”。
普通用户发送：XGWLANMM（大小写均可）□原密码□新密码（密码不区分大小写，长度为6位）至10086；XGMM为“修改密码”拼音的首字母，□表示空格。
密码修改成功，返回短信通知：“您已成功修改WLAN密码，新密码为：XXXXXX，请注意保管。
”密码修改不成功，返回短信通知：“对不起，修改密码不成功，请核实原密码是否正确，可稍后再试或拨打10086咨询”。
1.3 密码重置高校用户发送：CZEDUMM(大小写均可)至10086：；CZMM为重置密码拼音的首字母。
密码重置成功，返回短信通知：“您已重置高校WLAN密码，新密码为：XXXXXX，请注意保管”。
密码重置不成功，返回短信通知：“对不起，密码重置不成功，请稍后再试或拨打10086咨询”。
wifi的ru理解
Wi-Fi的入门指南什么是Wi-FiWi-Fi是一种无线通信技术，它允许电子设备之间通过无线信号进行数据传输。
Wi-Fi是”Wireless Fidelity”的缩写，它基于无线局域网（WLAN）标准，使用无线电波作为传输介质。
Wi-Fi技术已经广泛应用于家庭、办公室、公共场所等各个领域，成为我们日常生活中不可或缺的一部分。
Wi-Fi的工作原理Wi-Fi使用无线电波在设备之间传输数据。
当我们的设备（如手机、电脑）连接到Wi-Fi网络时，它们会通过无线路由器与互联网进行通信。
无线路由器是一个将有线网络连接转换为无线信号的设备，它将接收到的数据包转发到目标设备，同时也将从目标设备接收到的数据包转发到互联网。
Wi-Fi使用的无线电波是一种高频电磁辐射，它在2.4GHz和5GHz两个频段工作。
无线路由器通过发射和接收这些无线电波来建立和维持与设备之间的通信。
设备之间的通信是通过Wi-Fi协议进行的，这是一种规定了通信方式和数据传输规则的标准。
Wi-Fi的优势Wi-Fi的出现给我们的生活带来了许多便利和优势：1.无线连接：Wi-Fi允许我们无线连接到互联网，不再需要使用电缆连接。
这使得我们可以在家中的任何地方或办公室内自由移动，而不必受到电缆长度的限制。
2.高速传输：Wi-Fi网络通常具有较高的传输速度，可以满足我们对于快速数据传输的需求。
这使得我们可以更快地下载和上传文件，观看高清视频等。
3.多设备连接：Wi-Fi网络可以同时连接多个设备，这使得我们可以在家庭或办公室内的多个设备上同时使用互联网。
我们可以在电脑、手机、平板电脑等设备上无缝切换使用。
4.灵活性：Wi-Fi网络的覆盖范围可以根据需要进行扩展，我们可以通过增加无线路由器或Wi-Fi扩展器来覆盖更大的区域，以满足不同场所的需求。
Wi-Fi的安全性尽管Wi-Fi带来了许多便利，但它也存在一些安全风险。
由于Wi-Fi网络是无线的，它的信号可以穿墙传播，这意味着附近的人也可以接收到Wi-Fi信号。
wpa2认证过程 -回复
wpa2认证过程-回复WPA2（Wi-Fi Protected Access 2）是一种无线网络认证和加密协议，旨在提供更高的安全性保护。
它是WPA（Wi-Fi Protected Access）的升级版本，采用了更强大的认证和加密算法，用于保护我们的无线网络免受黑客和入侵者的攻击。
WPA2的认证过程非常重要，它确保只有经过身份验证的用户才能连接到受保护的无线网络。
下面，我将详细解释WPA2认证过程的每个步骤。
1. 首先，客户端设备（例如手机、笔记本电脑等）向无线接入点（AP）发送认证请求。
该请求是以EAPOL（Extensible Authentication Protocol over LAN）帧的形式发送的。
这个帧包含了一个认证请求，请求AP对客户端进行认证。
2. 接下来，AP将向客户端发送一个EAP响应帧，要求客户端提供身份认证凭据。
3. 客户端收到EAP响应帧后，将会响应该帧，并向AP发送包含其身份认证凭据的EAP请求帧。
这些凭据可能是用户名和密码，证书或其他认证方式。
4. AP接收到客户端的EAP请求帧后，将使用此信息进行验证。
AP通常会将认证请求转发给远程认证服务器（例如RADIUS服务器）进行身份验证。
5. 远程认证服务器将验证客户端提供的凭据，并发送EAP响应帧来告知AP身份验证的结果。
如果客户端凭据匹配，并且身份验证通过，认证服务器将发送成功响应的EAP响应帧。
否则，将发送失败响应的EAP响应帧。
6. AP接收到身份验证结果的EAP响应帧后，将通知客户端身份验证的结果。
如果身份验证成功，AP将继续与客户端建立安全连接。
否则，AP可能会拒绝客户端的连接请求并终止该连接。
7. 客户端收到AP发送的身份验证结果后，将响应成功或失败的EAP响应帧。
如果身份验证成功，客户端将继续进行关键的密钥协商过程。
如果身份验证失败，客户端将被禁止访问受保护的无线网络。
8. 关键的密钥协商过程是WPA2认证的下一个重要步骤。