Wireless Network Standards - CompTIA A+ 220-1101 - 2.3

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  • Опубліковано 29 січ 2025

КОМЕНТАРІ • 87

  • @Joyos77
    @Joyos77 2 роки тому +326

    Great video! Just wanted to let you know that I passed my A+ exam last year and it was so satisfying and brings encouragement to go after the other CompTIA courses.

  • @cincinnatiking8008
    @cincinnatiking8008 Рік тому +96

    I want to sincerely thank you for doing this for the world. Because of your help I am able to better mine and my families life

  • @lancelyde
    @lancelyde Рік тому +57

    I love when I can recognize these technologies in my daily life! It makes learning more fun. I realized library books use RFID stickers to track the books! I remember seeing the stickers on the backs and never knowing what they were. Now I know!! Yay!!

    • @sistergray977
      @sistergray977 Рік тому +3

      That is such a good example! Thx. I'm now seeing the RFID stickers everywhere.

  • @chinoyomaji288
    @chinoyomaji288 Рік тому +9

    This, so far, is the one module i can understand the most thanks to my few short months of working at spectrum

  • @MyronVsTheWorld
    @MyronVsTheWorld 5 місяців тому +30

    The 15+ minute videos are always the toughest to sit down and digest😪

    • @jasonfilla7320
      @jasonfilla7320 5 місяців тому +12

      We got this bro

    • @noor8361
      @noor8361 5 місяців тому +7

      Hey! Are you doing A+ cert too? If you don't mind we can have a discord group and discuss resources and stuff together.

    • @MyronVsTheWorld
      @MyronVsTheWorld 5 місяців тому

      @@jasonfilla7320 you’re right bro! I really needed that, thank you!!

    • @justinreinhart3458
      @justinreinhart3458 5 місяців тому

      Can you send me an invite?​@@noor8361

    • @justinreinhart3458
      @justinreinhart3458 5 місяців тому

      I always increase the video speed. But you csn always pause amd take a break. Just dont stop

  • @RPGyourLIFE
    @RPGyourLIFE Рік тому +4

    Sincerest thanks and love to you, Professor. You are streamlining my success.

  • @TomTreutlein
    @TomTreutlein 8 місяців тому +3

    Thank you for making all of these easily accessible videos. They are very helpful.

  • @PeterGMerchant
    @PeterGMerchant 5 місяців тому +1

    Great update on the new standards.

  • @Xtrah0ts4uce
    @Xtrah0ts4uce 10 місяців тому +1

    Thanks for helping us study ur the goat

  • @JKingSniper
    @JKingSniper 6 місяців тому +6

    RFID chip powering is just cool

  • @moortje8250
    @moortje8250 Рік тому +6

    4:39 Professor Messer mentions that an access point(AP) can be upgraded while explaining backwards-compatible. Does anyone know what he means by upgrading an AP? He explained APs in Network Devices. I understand an AP to be a device that is directly connected to a wired LAN and provides wireless connections to other devices. Is an AP capable of using softwares and he means upgrading these softwares?

    • @lightning_Fire248
      @lightning_Fire248 Рік тому +11

      Access points have different wireless types. He's saying that the wireless type G (which is faster than B) is backwards compatible with B. So if you upgraded your access point to a wireless G, you can still have B devices run on it. That is a physical upgrade of the access point.

    • @JoshuaLopez-c4f
      @JoshuaLopez-c4f 9 місяців тому +2

      I'm pretty sure he means "upgrade" like how you upgrade your phone by replacing it with an entirely new one. 802.11g being backwards compatible with b means that the b devices will still be able to use the 'newer' g access point.
      Late reply, but hopefully it helps others out.

  • @BigGlokk
    @BigGlokk 2 роки тому +17

    Memorizing the PoE standards before this video is helping me remember these lol

    • @95fyken
      @95fyken Рік тому +8

      what exactly do you need to memorize ? i find it hard to navigate what i need to memorize in these videos

    • @frinx101
      @frinx101 Рік тому +4

      @hello from me
      Memorize the frequency and also speed

    • @ImSomeRandomDad
      @ImSomeRandomDad Рік тому +1

      ​@@95fykeneverything. Everything that is covered can have a correlating question.

    • @Twice_Nightly
      @Twice_Nightly 4 місяці тому +2

      It's worth it to buy the notes from his website. The notes he's created have everything you need and nothing you don't. You can just keep looking over them until the shit sinks in. It's good stuff. Praise be to Messer. I bought the notes and whenever I forget stuff I just look over them. Helps mucho grande.

    • @ac31454
      @ac31454 3 місяці тому

      @@Twice_Nightly facts

  • @senditall152
    @senditall152 Рік тому +3

    Thank you for this great course!

  • @seanturner7511
    @seanturner7511 Рік тому +8

    Has anybody found a good way to memorize the characteristics of each standard? Should i just use flashcards?

    • @wok4940
      @wok4940 Рік тому +5

      That's what I do. I used quizlet and created my own flashcards and plan to do so for every topic. It helps me.

    • @KhaliltheGreat23
      @KhaliltheGreat23 Рік тому +4

      Try making Anki cards. One way that I found works for me is grouping them by frequencies (5 GHz, 2.4GHz, & 2.4GHz/5GHz)

  • @douglasduda9826
    @douglasduda9826 2 роки тому +10

    I remember a Linksys router we had would hang when the microwave was on...lol...It was annoying...

  • @dj10schannel
    @dj10schannel Місяць тому

    Awesome!! 🙏 thx for the great vid and awesome explanations

  • @taylorsimpson8897
    @taylorsimpson8897 Рік тому +6

    Confused where you said 802.11ax or WIFI 6 can run 1.2 GB but on the powerpoint it says Mbit/s. Could you help me understand which one it is for my notes? Thank you. Love the work you do!

    • @professormesser
      @professormesser  Рік тому +18

      1,201 Mbit/sec is the same as 1.2 Gbit/sec.

    • @insignificant5822
      @insignificant5822 8 місяців тому +1

      @@professormesser How is the WiFi 6 an upgrade when 802.11ac has 7 Gbits / s compared to 802.11ax which only has 1.2 Gbits / s. rather it looks like a decrease?

    • @dcvc619
      @dcvc619 8 місяців тому

      @@insignificant5822 the maximum throughput of each standard is equal to its throughput per stream multiplied by the number of streams it has. 802.11ac has 867 Mbit/s per stream and we multiply this by the 8 streams it has which gives us the 7 Gbits/s. 802.11ax has 1.2 Gbit/s per stream, and 8 streams which makes its total throughput 9.6 Gbit/s

    • @dcvc619
      @dcvc619 8 місяців тому

      @@insignificant5822 the table at 10:30 helps with this

    • @MaskedKingDavid
      @MaskedKingDavid 8 місяців тому +2

      @@insignificant5822 If I'm reading the information and grasping it right, the nearly 7 Gbits for 802.11ac is the theoretical max throughput when adding up all the MU-MIMO streams, of which 802.11ac has 8, each of those 8 having a max theoretical throughput of 867 Mbits/s, whereas 802.11ax's 1.2Gbits/s is the max theoretical throughput for a single one of its streams, and when you add up all the MU-MIMO streams to reach the equivalent of 802.11ac's nearly 7 Gbits/s, you get 9.6 Gbits/s, which is definitely an upgrade.

  • @jasonburrs3142
    @jasonburrs3142 2 роки тому +13

    Do the course notes have some type of glossary to define what the acronyms in the video represent? Sometimes it's difficult to follow the videos when unfamiliar acronyms are reference.
    From a video standpoint it conserves time I understand but from a learning standpoint it complicates the ability to process the info provided.

    • @professormesser
      @professormesser  2 роки тому +19

      The CompTIA Exam Objectives are available free from the CompTIA website, and the objectives include a comprehensive glossary.

    • @jasonburrs3142
      @jasonburrs3142 2 роки тому

      @@professormesser
      Thank and thank you for providing this video resource. I'll still get the notes to reinforce the information provided in these videos

    • @electroevolution5777
      @electroevolution5777 Рік тому +3

      The exam objectives Messer listed have all of the definitions, acronyms, and the exam objectives listed in the order in which Messer's videos are listed. I reference them often to see what I really need to takes notes on. Messer gives not just the straight information we need but also rounded information to give us a better idea of what we are learning. Some of that rounded information isnt necessary for the exam but rather just for us to understand.

  • @theshorteningoftheway276
    @theshorteningoftheway276 7 місяців тому

    @6:30 how do 4 antennas at 40MHz translate to 600 Mbps?

    • @theshorteningoftheway276
      @theshorteningoftheway276 6 місяців тому

      @BannerComposure What I'm asking is how "40MHz mode and 4 antennas" adds up to 600. Does 40MHz mean 150Mbps in this case?

  • @pissedputin7738
    @pissedputin7738 2 роки тому +22

    Will the exam quiz us with the different speeds of the different standards? Or we will be fine if we just memorize 802.11a, 802.11b etc..

    • @davidsmithson7806
      @davidsmithson7806 2 роки тому +1

      I am wondering too

    • @iamjuniorduh
      @iamjuniorduh 2 роки тому +31

      Yes, pbqs will ask you to set up a network for a said environment. Ex: office vs warehouse

    • @stephclewis
      @stephclewis Рік тому +2

      @@iamjuniorduh But honestly is anyone really going to use an 802.11a or b because they are so old? Are those really good choices overall?

    • @cathyjones4702
      @cathyjones4702 Рік тому +1

      @@iamjuniorduh Answer to PBQ: "I will google it and find out"

    • @gsanchez922
      @gsanchez922 Рік тому +1

      ​@Steph Clewis there are devices that still use it

  • @CabooseDOTexe
    @CabooseDOTexe 3 місяці тому

    RFID are so cool!

  • @sagalhamze1949
    @sagalhamze1949 Рік тому +3

    May God bless you

  • @Sam-fz9ti
    @Sam-fz9ti 10 місяців тому

    Anyone able to explain the different between the channel width and the GHz range of the network? Knowing this may be unnecessary for the A+, I'm not sure.

    • @babygiraffeman
      @babygiraffeman 9 місяців тому

      the difference between the words or the actual range benefits? Keep watching he touches on this. Short answer different ranges are needed for the scenario you are in. Understanding the bands you can use an wifi analyzer and look at congestion and such.

  • @whoisCH3DDAR
    @whoisCH3DDAR Рік тому +2

    So signals are going through us?

  • @ifeelkiing
    @ifeelkiing Місяць тому

    thanks

  • @dumplingsuwu6691
    @dumplingsuwu6691 Рік тому +3

    54 mbps back in 1999, yet my isp here doesn't even provide more than 3 mbps todays irl 😂

  • @JEHOVASAVES010
    @JEHOVASAVES010 2 роки тому +3

    Professor Messer, as help desk are you going to be asked to install an antenna or can the company bring in a third party to install it?

    • @professormesser
      @professormesser  2 роки тому +17

      I suppose that depends. Do they need it to work and comply with the appropriate local building codes? A professional would probably be the better investment.

    • @JEHOVASAVES010
      @JEHOVASAVES010 2 роки тому +1

      @@professormesser thanks.

    • @davidbutt6181
      @davidbutt6181 2 роки тому +16

      I'm a help desk tech. It's very unlikely you will do much in terms of networking, security, or hardware. Help Desk is typically entry level. It varies from company to company, and assuming you're not the entire IT department, you'll probably do a lot of "easy" stuff. Printer not printing, laptop not connecting to wifi, can't access folder on the local server, forgot username/password. Half the time it's used error. A coworker calls it "keyboard input error."

    • @JEHOVASAVES010
      @JEHOVASAVES010 2 роки тому

      @@davidbutt6181 What do you mean by used error? Any tips on passing the A+ exam such as resources, etc. Thanks.

    • @davidbutt6181
      @davidbutt6181 2 роки тому +9

      @@JEHOVASAVES010 Sorry. I meant user error.
      I don't have any certs to be honest. TLDR; I work for a school district and I used to be in a different department. A position in IT opened up. I applied and had enough knowledge from personal experience with building and maintaining my home network and PCs to pass a job test and interview.
      I've been slowly making my way through Prof. Messser's videos to learn about what I don't already know. At some point I plan on taking the test so it helps me get a better position in the future. What I try to do is learn about a section and take a practice test immediately after (you can google Comptia A+ practice test). Then I'll test again at a later date to see if I remembered the info.

  • @neo.5327
    @neo.5327 3 місяці тому

    Anyone notice he said 802.11 Ax transmits 1,201 gigabits per second but wrote megabits in the screen?

    • @professormesser
      @professormesser  3 місяці тому +3

      I describe the maximum theoretical per-stream throughput of 802.11ax as 1.2 gigabits per second, and that's the same value as 1,200 megabits per second.

  • @awl4114awl
    @awl4114awl 7 місяців тому

    salute

  • @SupaMan2122
    @SupaMan2122 28 днів тому

    B slower than A will never make logical sense to me 😂