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Wi-Fi Fundamentals LiveLessons: A CCNA Wireless and CWNA Primer
Год выпуска: 2014
Производитель: Cisco Press
Сайт производителя: ciscopress.com
Автор: Jerome Henry
Продолжительность: 4:46
Тип раздаваемого материала: Видеоклипы
Язык: Английский
Описание: Wi-Fi Fundamentals LiveLessons is a video tutorial that provides users with over seven hours of personal, visual instruction from wireless expert and instructor Jerome Henry. The tutorial contains a series of short instructional videos that demonstrates the concepts and mechanics behind RF, Wi-Fi networks, and 802.11 frame exchanges.
Wi-Fi Fundamentals LiveLessons contains 8 individual videos lessons, subdivided into 48 sublessons, for a total of more than six hours of instruction. The videos consist of audio instruction and animations. Each video presents detailed objectives and video captures. Audio instruction throughout offers detailed explanations and tips.

Содержание

Lesson 1: 'Connecting without Wires' is an introductory lesson that will guide you through the concepts, of WPAN, WLAN, SSID, ad-hoc vs. infrastructure, roaming, and also introduce you to specialized wireless devices, such as mesh APs, repeaters and Workgroup Bridges. It will also explain the role of the IEEE and of the Wi-Fi Alliance.
Lesson 2: 'Sending a Signal: Powers and Power Maths in Wi-Fi', you will discover in this lesson that with some basic rules, you can immediately estimate the range of a wireless AP, compare antennas and determine if a wireless signal will be strong enough at a given location to provide the data rate you need.
Lesson 3: 'Sending a Signal: Antennas' this lesson will show you how to decipher the antennas radiation pattern schemes provided by antenna vendors, and how to choose the right antenna for your network. It will also guide you through the various accessories that can be added to the antenna itself (attenuator, amplifiers, lightning arrestors) to tune its signal, while providing you the information you need to make sure that your installation respects the local regulations.
Lesson 4: 'Sending RF Signals: Overcoming Distrance and Obstacles' will guide you through the different factors that affect traveling RF signals, including free-space losses, obstacles, multipath, and also non-802.11 interferers. This lesson will help you determine the right “link budget” that will send the right signal, at the right power level and with the right shape.
Lesson 5: 'Converting Bits into RF Waves' will explain these different techniques used to encode bits into RF signals, allowing you to understand why some devices will get 1 Mbps while others, connected to the same AP, get several hundreds of Mbps.
Lesson 6: 802.11 and Ever Faster Wi-Fi will guide you through this evolution of the 802.11 standard, and explain the different techniques put in place to allow for increased speeds. 802.11 is not just about speed, but also about “better, more efficient networks”, and this lesson will also guide you through the features of the evolving 802.11 standard.
Lesson 7: 'Wi-Fi Security' will guide you through the various forms of security available for Wi-Fi networks. You will understand why Wi-Fi has the reputation of being insecure, and how following simple good practices can render your Wi-Fi network more secure than most wired LANs.
Lesson 8: 'Crafting and Exchanging 802.11 Frames' will guide you through the choreography of 802.11 frame exchanges, to help you understand management, control, data frames, timers, QoS, and all other elements that allow for a successful Wi-Fi communications.
Файлы примеров: не предусмотрены
Формат видео: MP4
Видео: AVC, 1280x720, 16:9, 25fps
Аудио: AAC, 44.1kHz, stereo

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Frame rate mode : Constant
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Audio
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Compression mode : Lossy
General
Complete name : 16.3.3 Why Use Directional Antennas-.mp4
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Frame rate mode : Constant
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Audio
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Audio
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General
Complete name : 18.3.5 Using Connectors.mp4
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Audio
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General
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Frame rate mode : Constant
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Format profile : Baseline@L3
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Format settings, ReFrames : 3 frames
Codec ID : 7
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Frame rate mode : Constant
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Audio
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Compression mode : Lossy
General
Complete name : 21.4.1 Understanding RF Terms and Concepts - Frequency, Wavelength, and Amplitude.mp4
Format : Flash Video
File size : 12.1 MiB
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Audio
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Compression mode : Lossy
General
Complete name : 22.4.2 Going through Obstacles - Absorption, Reflection, Multipath, Scattering, and Refraction.mp4
Format : Flash Video
File size : 15.4 MiB
Duration : 9mn 53s
Overall bit rate : 217 Kbps
Video
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Format settings, CABAC : No
Format settings, ReFrames : 3 frames
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Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
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Audio
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Format profile : LC
Codec ID : 10
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Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
General
Complete name : 23.4.3 Losing or Gaining Signal in Free Space - Line of Sight, Free Path Loss Model, and Fresnel Zone.mp4
Format : Flash Video
File size : 12.2 MiB
Duration : 6mn 58s
Overall bit rate : 245 Kbps
Video
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Format settings, CABAC : No
Format settings, ReFrames : 3 frames
Codec ID : 7
Duration : 6mn 58s
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Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
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Scan type : Progressive
Bits/(Pixel*Frame) : 0.052
Writing library : x264 core 114 r1913 5fd3dce
Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=abr / mbtree=1 / bitrate=1200 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.41 / aq=1:1.00
Audio
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Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 10
Duration : 6mn 58s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy

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