پیشنهاد فرادرس

آموزش اصول Wi-Fi

دسته بندی ها: آموزش های LiveLessons ، آموزش شبکه

آموزش-اصول-wi-fi

WiFi مخفف كلمات Wireless Fidelity می باشد و در حقیقت یك شبكه بی سیم است كه مانند امواج رادیو و تلویزیون و سیستم های تلفن همراه از امواج رادیویی استفاده می كند. برقراری ارتباط با شبكه بی سیم شباهت زیادی به یك ارتباط رادیویی دو طرفه (مانند بی سیم پلیس) دارد.

آنچه رخ می دهد به این شكل است:

یك مبدل بی سیم اطلاعات را به سیگنالهای رادیویی ترجمه میكند و آنها را ارسال می كند.

یك روتر (router) بی سیم سیگنالها را دریافت و رمز گشایی می كند و تبدیل به اطلاعات می كند. حال این اطلاعات با استفاده از یك اتصال سیمی اترنت به اینترنت فرستاده می شود.

این فرآیند در جهت معكوس هم كار می كند (آنچه بیشتر كاربران معمولی آنرا احساس میكنند) یعنی روتر اطلاعات را از اینترنت دریافت می كند. تبدیل به سیگنال های رادیویی كرده و برای كامپیوتر هایی كه مجهز به سیستم بی سیم هستند ارسال می كند.

این دوره آموزشی از موسسه Livelessons شما را با تکنولوزی WiFi آشنا می کند.

سرفصل های دوره آموزشی:

  • Powers و Power Maths در Wi-Fi
  • اتصال بدون سیم
  • ارسال یک سیگنال
  • تبدیل اطلاعات دیجیتال به امواج رادیویی
  • ارسال سیگنال RF
  • امنیت Wi-Fi

لیست سرفصل های دوره آموزشی:

7+ Hours of Video Instruction

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.

Lesson 1 Lesson 1: Connecting without Wires, Downloadable Version 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. Duration: 00:25:17

Lesson 2 Lesson 2: Sending a Signal: Powers and Power Maths in Wi-Fi, Downloadable Version 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. Duration: 00:30:45

Lesson 3 Lesson 3: Sending a Signal: Antennas, Downloadable Version 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. Duration: 00:40:29

Lesson 4 Lesson 4: Sending RF Signals: Overcoming Distance and Obstacles, Downloadable Version 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. Duration: 00:51:39

Lesson 5 Lesson 5: Converting Bits into RF Waves, Downloadable Version 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. Duration: 00:56:44

Lesson 6 Lesson 6: Ever Faster Wi-Fi, Downloadable Version 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. Duration: 01:31:13

Lesson 7 Lesson 7: Wi-Fi Security, Downloadable Version 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. Duration: 00:53:25

Lesson 8 Lesson 8: Crafting and Exchanging 802.11 Frames, Downloadable Version Lesson 7: '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.

عنوان دوره: Livelessons - Wi-Fi Fundamentals حجم فایل: 736MB

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Livelessons WiFi Fundamentals

پیشنهاد فرادرس

irani در 1393/04/22 ساعت 16:18

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آموزش هک Wi-Fi میخوام
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