Five Fundamentals of RF You Must Know for WLAN Success

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ความคิดเห็น • 87

  • @junwuluo1231
    @junwuluo1231 6 ปีที่แล้ว +134

    It really starts at 4:11, just skip and save yourself 4 minutes. and set speed to 1.5.

    • @_tabot9268
      @_tabot9268 4 ปีที่แล้ว

      Think you bro ¶

    • @craig893
      @craig893 2 ปีที่แล้ว

      Exactly what i did.

    • @Wadmd
      @Wadmd 2 ปีที่แล้ว

      Nice

  • @user-ec4hz2ft6h
    @user-ec4hz2ft6h 4 หลายเดือนก่อน +2

    thanks to this video, i was able to succefully pass the past exam questions i’ve been practicing. I got he past questions from Leanology World for free , they gave me official CWNA 109 study guides for free as well but those study guides where not enough for me, this video tutorial was able to put the knowledge that i got from the study guide into perspective. ❤ thank you a much for making this tutorial video ❤

  • @chimeranzl9147
    @chimeranzl9147 6 ปีที่แล้ว +18

    Save yourself some time, jump to 4:20. Brilliant overview.

  • @shreyasathavale
    @shreyasathavale 5 ปีที่แล้ว +1

    Tom- one of the best videos presented by cwnp.Really gives a clear understanding of all the basics.

  • @joelpanettaonline
    @joelpanettaonline 6 ปีที่แล้ว +21

    How the heck can 19 people give this a thumbs down?????? Tom & CWNP are the best out there at explaining this stuff.

    • @tomwold7288
      @tomwold7288 6 ปีที่แล้ว +3

      Joel Panetta Online Simple why there are 19 thumbs down. 19 idiots = 19 thumbs down.

    • @sbyrum
      @sbyrum 6 ปีที่แล้ว +9

      Keep in mind there are people that actually believe that earth is flat. unfortunately, they have access to the internet too.

    • @andrewlankford9634
      @andrewlankford9634 6 ปีที่แล้ว +1

      Wikipedia is better. Or a text book, MIT lecture for that matter.

    • @CsFanatiker
      @CsFanatiker 6 ปีที่แล้ว

      Research cellphone radiation
      Research cellphone tower radiation
      Research wireless/wifi radiation

    • @CsFanatiker
      @CsFanatiker 6 ปีที่แล้ว

      How narrow minded you people must be to believe there are no downsides to wireless tech........... pffff tbh gtfo fried zombie brains and your wireless tech

  • @PeteMaverickMitchell87
    @PeteMaverickMitchell87 8 ปีที่แล้ว +3

    Good video! Some of the discussion reminds me of EE courses taken long ago.

  • @clsmith619
    @clsmith619 6 ปีที่แล้ว +1

    Great refresher. Thank you.

  • @zaidhussain5206
    @zaidhussain5206 7 ปีที่แล้ว

    Thank you for this video, really informative

  • @andresrcqr
    @andresrcqr 6 ปีที่แล้ว

    Great Video explaining fundamentals

  • @howardhiggins5059
    @howardhiggins5059 7 ปีที่แล้ว +1

    Great video Tom.

  • @juliandevilliers6435
    @juliandevilliers6435 5 ปีที่แล้ว

    Very informative, thank you for sharing

  • @CruisinShady
    @CruisinShady 7 ปีที่แล้ว

    Good Info. Thanks for the video!

  • @iamdeadism
    @iamdeadism 7 ปีที่แล้ว

    Thank you. Good video!

  • @SK_TRS
    @SK_TRS 3 ปีที่แล้ว

    Thank you, it was really informative.

  • @NetSecAcademy
    @NetSecAcademy 3 ปีที่แล้ว

    Where can I get complete video training from this guy please ? So well explained

  • @aswath7
    @aswath7 5 ปีที่แล้ว

    very good video to start learning about wireless technologies basics

  • @anwarulhoda7636
    @anwarulhoda7636 6 ปีที่แล้ว

    I know all of these things. Thank you

    • @prd9843
      @prd9843 5 ปีที่แล้ว

      then why the heck are you here? sshooo!! get the hell out!

  • @thepokergrind
    @thepokergrind 7 ปีที่แล้ว +8

    7:43 : wavelength is a distance expressed in meters, and the period is in seconds (how many cycles in a seconds = n hertz). They seem mixed up in their definitions.

    • @Cinncinnatus
      @Cinncinnatus ปีที่แล้ว

      props... someone knowing their stuff. most ppl if you said 80m or 10m etc they wouldnt even have a clue.

  • @feliciab6050
    @feliciab6050 3 ปีที่แล้ว

    Thank you Sir!!

  • @MegaUtuser
    @MegaUtuser 4 ปีที่แล้ว +1

    Brilliant outstanding.

  • @ruchitaahluwalia9695
    @ruchitaahluwalia9695 7 ปีที่แล้ว +11

    It would have helped if you've used similar graph to 2.4GHz to describe the 5GHz so novice person like me can visualize the difference in comparison of two. Other than that it was a great video.

  • @mithunt4455
    @mithunt4455 6 ปีที่แล้ว

    thank you

  • @NassimDhaher
    @NassimDhaher 7 ปีที่แล้ว

    at 28:00 you say:"Interference happens at the receiver", but won't the sender receive the responses from the "receiver" as well and therefore become a receiver. Or you meant to say interference happens on reception of signal???

  • @villagevaliant
    @villagevaliant 2 หลายเดือนก่อน

    When it comes to refraction: Generally how wide is a wave length ? You mentioned a filing cabinet 🗄️ while the display gives an example of a roof top ? Also what is the size difference between that of say 2.4 opposed to the 5ghz [ if you aren’t sure of exact dimension- Maybe you’d be able to say which is wider over the other (2.4 or 5). ]

  • @swethareddy3465
    @swethareddy3465 7 ปีที่แล้ว

    What unique concerns must be addressed by the designer of a WLAN network?

  • @villagevaliant
    @villagevaliant 2 หลายเดือนก่อน

    I hear you 🤚🏾

  • @kiraal3619
    @kiraal3619 4 ปีที่แล้ว

    thanks a lot

  • @kworgz
    @kworgz 8 หลายเดือนก่อน

    These are great, but if you add animation when explaining some of the concepts like interference etc. these videos would really take off

  • @rdalben
    @rdalben 2 ปีที่แล้ว

    In a 4x3 AP, Is there a way to setup the client to connect not using 3x3 but 2x2 or 1x1 ?

  • @akhileshkumar-fu6of
    @akhileshkumar-fu6of 7 ปีที่แล้ว

    Excellent explanation sir
    But how to change 11 and 12 dbm in mw by your 3 and 10 technique

    • @JonathanWaltersDrDub
      @JonathanWaltersDrDub 7 ปีที่แล้ว +2

      The premise for that quick chart is that 10^(0.3) = 2 approxmiately. For increasing 1 dBm we would see that 10^(0.1)=1.25 so we would multiply the original power by 1.25 to increase its strength.

    • @georgecuclea7770
      @georgecuclea7770 4 ปีที่แล้ว

      11dBm = 20dBm-3dBm-3dBm-3dBm
      11dBm= 100mW/(2*2*2)=100mW/8=12.5mW
      and
      12dBm= 3dBm+3dBm+3dBm+3dBm
      12dBm=2mW*2mW*2mW*2mW=16mW

  • @jeffm2787
    @jeffm2787 3 ปีที่แล้ว

    2.4 is alive and kicking, well at least for home and IOT related devices. Once you get out of the cities it becomes completely useable even for 4k streaming, etc. Use 5Ghz of course where possible.

  • @user-hm2gb6pm6b
    @user-hm2gb6pm6b 2 หลายเดือนก่อน

    Red light scattering in many direction
    Absorption
    reflection
    refraction

  • @spiderx01
    @spiderx01 2 ปีที่แล้ว

    Hello, what is controlling power output of the access point? Voltage or amperage? What increases or decreases the transmission power?

    • @Cinncinnatus
      @Cinncinnatus ปีที่แล้ว

      wattage.... ie was both... typically voltage is a fixed point due to hardware limitations (now...) so its mainly amperage but it very well can be both. but since almost no-one deals with HV amplifiers now its pretty much always amps now but you really dont even deal with that due to frequency based modulation not amplitude. and if we talking your home wifi set it to the lowest possible setting that still lets you get a signal without issues. eg. my home 2.4/5ghz wifi runs @ 1/4 watt vs the default of 1 watt

  • @Hazwan-ud7mz
    @Hazwan-ud7mz 4 ปีที่แล้ว

    this good video

  • @the_mze
    @the_mze 4 ปีที่แล้ว

    Remember that when you watch this now, there is UNII-4 Channels aswell! (75 MHz additional!)

  • @danielghani3903
    @danielghani3903 ปีที่แล้ว

    thanks

  • @SaiPawan012
    @SaiPawan012 8 ปีที่แล้ว +2

    What about Omnipeek in analysis of network?

    • @Rudebwoy22
      @Rudebwoy22 7 ปีที่แล้ว

      How r u pawan

  • @tuantrungchauhoang6325
    @tuantrungchauhoang6325 3 ปีที่แล้ว

    Trainning's voice sound like from Kevin Wallace , right?

  • @andrewlankford9634
    @andrewlankford9634 6 ปีที่แล้ว +1

    Wireless Lan Success (C) (TM) !

  • @Cpripri85
    @Cpripri85 ปีที่แล้ว

    If anyone reads this can they please direct me to radio frequency training for tower climbers I'm trying to find a review course online while I'm waiting for my own industry to provide me with the class for some reason I cannot find anything online

  • @kimberlycoffey7395
    @kimberlycoffey7395 6 ปีที่แล้ว

    yup

  • @ahmednor5806
    @ahmednor5806 2 ปีที่แล้ว +2

    🙏🌹

  • @marekz6656
    @marekz6656 5 ปีที่แล้ว +1

    Where are you rushing like that? Any consideration for listeners?

  • @vikrantvijit1436
    @vikrantvijit1436 3 ปีที่แล้ว

    Wonderful teaching style of technical complex concepts on internet perhaps world best about the Radio Silent Art of beauty that kills beasty Sound of Science As a Signal at Attack Surfaces deep seated Spheres Influencing Work Life and death facing Issues.

  • @brianvandenberg4467
    @brianvandenberg4467 6 ปีที่แล้ว

    7:00 7:27 not .762 or .223 They did a good job didn't they....But you cant live on the spacestation #Fukushima js

  • @Zephanyahh
    @Zephanyahh 3 ปีที่แล้ว

    Brah, I have known this for years and they made a certificate for it??? What!?

  • @Hazwan-ud7mz
    @Hazwan-ud7mz 4 ปีที่แล้ว +1

    sorry...
    can you make subtitle in indonesian language in this video?

  • @abhijithboppe1870
    @abhijithboppe1870 5 ปีที่แล้ว

    what is rf duty cycle and how is it different from PWM duty cycle

  • @ahemednor5201
    @ahemednor5201 2 ปีที่แล้ว

    🙏🙏🌹🌹

  • @jerkshop
    @jerkshop 4 ปีที่แล้ว +1

    Hello is 80 and 160 recommended today for 5ghz

    • @RBzee112
      @RBzee112 4 ปีที่แล้ว

      No

    • @IvoBiermans
      @IvoBiermans 4 ปีที่แล้ว +1

      For home use you could get away with 80. For a business I would stick with 20, or if it's low density 40.

  • @user-kn6sz8hx1n
    @user-kn6sz8hx1n 5 หลายเดือนก่อน

    I can hear 6ou

  • @kmilo4307
    @kmilo4307 7 ปีที่แล้ว +3

    too fast for beginners

  • @rahnstoewhale7756
    @rahnstoewhale7756 6 ปีที่แล้ว

    hey

  • @onemorething100
    @onemorething100 2 ปีที่แล้ว

    Can you honestly say that these bands are innocuous and pose no harm to human life?

  • @duanenickerson7055
    @duanenickerson7055 6 ปีที่แล้ว

    #WHAT

  • @uss-usaf-atlantis
    @uss-usaf-atlantis 11 หลายเดือนก่อน

    No wlan ... its wifi ...

  • @brianvandenberg4467
    @brianvandenberg4467 6 ปีที่แล้ว

    ISM Industrial Scientific Medical unlicensed Frequencies....What could go wrong...I want my Software and my Frequencies back...Stop using my tech to ping & exacerbate unstable situations....#Explain #Parkland #ColumbineMassacre #SandyHook You cant live on the Spacestation...we found #Solutions I want my Frequencies, Software, & Tech back @Outcomes_Matter

  • @hussydevids2384
    @hussydevids2384 3 ปีที่แล้ว +1

    The wretched wilderness speculatively point because drama iteratively step up a enchanting latency. nappy, foamy cat

  • @BRYDN_NATHAN
    @BRYDN_NATHAN 10 หลายเดือนก่อน

    thank you