designing a wireless network phần 4 pptx
designing a wireless network phần 4 pptx
... maintainingIP addresses, you can get the details necessary to obtain a range. InNorth America, South America, the Caribbean, and sub-SaharanAfrica, the organization responsible is the Address ... pri-vate addressing schemes, usually referred to as internal networks,aredesigned that way because a majority of the traffic on that network islocal traffic, meaning that it does not leave the network. ... depleted.One measure to conserve address space is called Variable LengthSubnet Mask (VLSM).What is an address mask? The default address maskis represented in Table 3.3. (Remember that a Class A address...
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designing a wireless network phần 2 pptx
... thesignal cannot penetrate metal. Assume you have a metal sphere. As anEM wave hits the leading edge of the sphere, it acts like an antenna, andthe wave induces a voltage in the metal.This voltage ... data. An example of this is when an animal is tagged with a transmitter and the signal is collected and data is gathered over a periodof time to be interpreted at a later date.Monitoring applications ... andhow and why radio signals are modulated onto carrier waves; we’ll lookat antenna design, the relationship between wave propagation technolo-gies and signal power, and what elements make up a wireless...
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designing a wireless network phần 1 pot
... 21Chapter 2 Radio Elements and Frequency Spectrums 23Introduction 24 Transmitting Radio Signals Over EM Waves 24 Anatomy of a Waveform 25Modulating a Radio Signal 27Propagating a Strong Radio ... technology.Around the same time that Faraday worked with electromagnetism,an American professor named Joseph Henry became the first person totransmit a practical electrical signal. As a watchmaker, he constructedbatteries ... phones, pagers, and wireless Personal DigitalAssistants (PDAs) have become so commonplace in our lives that it iseasy to forget that ten years ago, they were a rarity. But wireless commu-nications...
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designing a wireless network phần 3 ppt
... antennas.Planar Array AntennasPlanar array antennas are similar in concept to Yagi antennas except allelements, both active and parasitic, lie in the same plane.This results in a flat antenna that can be mounted ... mounted flat on a wall, yet still have the proper-ties and gain of a directional antenna. Figure 2.17 shows a planar arrayantenna.www.syngress.comFigure 2.17 Planar Array Antenna and Associated ... Directional Beam PatternSide ViewPlanar Phased Array AntennaDirection of BeamAntennaGDirectional BeamMultiple Antenna Elements Shown with Dipole AntennasTop ViewSteerable BeamPlanar Array...
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designing a wireless network phần 5 pot
... Optical wireless data rates and maximum distance capabilitiesare affected by visibility conditions, and by weather conditionssuch as fog and rain.; Optical wireless has very high data rates ... canauthenticate a wireless device against a list of MAC addresses.This listcould reside locally on the AP, or the authentication could be checkedagainst a database of allowed MACs located on the ... received andwill transmit it again.All this takes place at the MAC layer. Noticing that an ACK has notbeen received, the sending unit is able to grab the radio medium beforeany other unit can and...
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designing a wireless network phần 6 potx
... theirgreatest weaknesses.The same can be said when examining the attributesof a wireless network. Both mobility and ease of access are touted assome of the greatest characteristics available when ... with an issue before escalating it?■How will an escalation take place?■Which procedures will be automated?■What tools are available to which organization?■What security changes are required?Depending ... capacity and total aggregate bandwidth, designers shouldbe aware that, as demand increases, so too will congestion and band-width contention in that spectrum. Because of the spectral and spatialattributes...
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designing a wireless network phần 7 ppt
... functionalboundary of the warehouse naturally makes it a separate subdomain.Thewww.syngress.com152_wan_07 6/21/01 3:25 PM Page 2392 34 Chapter 7 • Designing a Wireless Industrial Network: Retail Case ... OfficeOfficeOfficeBreakRoomAPAP152_wan_06 6/21/01 3: 24 PM Page 219 Designing a Wireless Enterprise Network: Hospital Case Study • Chapter 6 225Place the directional antenna so that the antenna energy ... electricity availability, and physicalaccess.The access points must connect to the existing network using a RJ -45 wire.An electrical outlet must be available for the access point.Physical access can...
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designing a wireless network phần 8 ppsx
... academic areas ofthe campus. At this time, only three academic areas are addressed.Theplanned network must be easy to adapt as these areas of study increase orchange. For example, the Math and ... Athletic department mayhave functional groups of coaches, players, and the press.TheAdministrative department may designate a Financial functional group, aswell as Student Records and Management ... as encryptionand password allocation to ensure the concept of fair play and remainwithin NCAA rules and guidelines. Both teams must have equal capabil-ities to meet NCAA rules.Visiting coaching...
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designing a wireless network phần 9 potx
... of raw data passed through a link or network and includes both overhead signaling data as well as userdata.Throughput refers to the actual amount of user data passedthrough the link or network. Q: ... signal with up to 8 high-quality 2 .4 GHz voicechannels and all the Custom Local Area Signaling Service (CLASS)calling features like call waiting and caller ID.The HomeRF standardalso uses a ... Page 296300 Chapter 8 • Designing a Wireless Campus Network: University Case Study A: Signal power and antenna type are the two primary factors in therange of the signal. Noise levels can also...
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designing a wireless network phần 10 pps
... 71antenna point bridge placements,218quarter-wavelength momopoleantennas, 51phased array antennas, 51planar array antennas, 53– 54 receiver antennas, 48 transmitter antennas, 48 AP Manager ... 42 43 modulation and, 27–28, 69and signal-to-noise ratio (S/N ratio),35–36, 69penetration and, 43 45 refracting, 41 42 signal propagation and, 34 45 , 69–70transmitting over electromagnetic (EM)waves, ... 27cyclical redundancy checksum (CRC), 76Ddaisy-chained signals, 2 84 data and voice networks, 326–3 34 data flow diagram (DFD), 169data-link layer, 75–77, 111default address masks, 94 Delivery...
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Từ khóa: how to setup a wireless network with multiple access pointsadvantages of using a wireless networkdisadvantages of using a wireless networkbenefits of using a wireless networkusing a wireless network without permissionis using a wireless network without the owners permission wrongconnecting to a wireless network without the permission of the ownersetup a wireless network without a router windows 7potential disadvantages to using a wireless networkdisadvantages of a wireless networkadvantages and disadvantages of using a wireless networkconnect to a wireless network printer windows 7adding a printer to a wireless network windows 7how to setup a wireless network printer windows 7connecting to a wireless network printer windows 7Báo cáo thực tập tại nhà thuốc tại Thành phố Hồ Chí Minh năm 2018Nghiên cứu sự biến đổi một số cytokin ở bệnh nhân xơ cứng bì hệ thốngBáo cáo quy trình mua hàng CT CP Công Nghệ NPVNghiên cứu sự hình thành lớp bảo vệ và khả năng chống ăn mòn của thép bền thời tiết trong điều kiện khí hậu nhiệt đới việt namNghiên cứu tổ chức pha chế, đánh giá chất lượng thuốc tiêm truyền trong điều kiện dã ngoạiBiện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANNghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúngChuong 2 nhận dạng rui roTăng trưởng tín dụng hộ sản xuất nông nghiệp tại Ngân hàng Nông nghiệp và Phát triển nông thôn Việt Nam chi nhánh tỉnh Bắc Giang (Luận văn thạc sĩ)chuong 1 tong quan quan tri rui roNguyên tắc phân hóa trách nhiệm hình sự đối với người dưới 18 tuổi phạm tội trong pháp luật hình sự Việt Nam (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtTrách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)HIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀMQUẢN LÝ VÀ TÁI CHẾ NHỰA Ở HOA KỲ