What is Microsoft Network Adapter Multiplexor Protocol and Should it be Enabled?

Kevin ArrowsUpdated on April 28, 2024
Kevin is a certified Network Engineer

The Microsoft Network Adapter Multiplexor Protocol is listed in the “Items this connection uses” list for the Wifi Properties. This option is disabled for many people by default and it often gets them confused if disabling or enabling it has an effect on their connection or bandwidth. Actually enabling this protocol while the rest of the options in the list are enabled is not possible.

Microsoft Network Adapter Multiplexor Protocol listed in the Wifi Properties

What is the Microsoft Adapter Multiplexor Protocol?

Microsoft Adapter Multiplexor Protocol is a special set of configurations that comes into play when a user combines two different connections. Actually, it is a kernel mode driver that is used for Network Interface Bonding. This means that two ethernet cards are combined to form one physical device in order to increase bandwidth.

When NIC teaming is initiated the Multiplexor Protocol is enabled for one or two (depending upon the connection and the number of network adapters connected) adapters while others still use other items from the list. Therefore, the Network Adapter Multiplexor Protocol is used only while combining two or more adapters. Usually for a LAN/WAN connection.

Should It be Enabled?

Many users ask if they should enable it or not. Basically, this Protocol only comes into play while combining Network Adapters or creating a Bridged connection as explained above. If you try to enable this option manually while the other items in the list are enabled, you will see this error

The Error message is seen when trying to enable Multiplexor Protocol

If you click on “Yes” the protocol remains disabled and the other items are enabled for your connection.If you click on “No” it takes you back to the list and no changes are made. Even if you disable all other options and try to enable only the “Microsoft Network Adapter Multiplexor Protocol” it still shows this error. This means that it can’t be enabled unless a connection is introduced into a bridge. Therefore, it should not be enabled. It is automatically enabled when a bridge is created and doesn’t require manual activation.

Kevin ArrowsUpdated on April 28, 2024
Kevin is a certified Network Engineer
ABOUT THE AUTHOR
Photo of Kevin Arrows

Kevin Arrows


Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.

Comments

15
    MI
    Mike Aug 12, 2019

    Does Microsoft Network Adapter Multiplexor Protocol have anything to do with Bluetooth? Just getting into tech finally…

    Reply
      SW
      Shane Warren Author Sep 5, 2019

      It might prevent some Bluetooth devices from connecting

      Reply
    LA
    Lusine Arabchyan Oct 24, 2019

    I have a question regarding my Intel Windows 10 laptop WiFi. When speed test is run results are 8-9 mbps vs. 200 mbps. My mobile devises show the correct speed. I have verified all my WiFi router setting with Netgear, yet no results. Any suggestion or advise?

    Reply
      SW
      Shane Warren Author Oct 29, 2019

      Your Wifi adapter on your computer might not be capable enough.

      Reply
    FS
    Fábio Nogueira da Silva Nov 6, 2019

    I have to internet service provider and two Ethernet cards on my computer, but when I make the bridge connection, I get on error, the bridge is made, but the option of the multiplexer protocol is unchecked. I have tried to enable it on my bridge connection unsuccessfully.

    Reply
      SW
      Shane Warren Author Nov 12, 2019

      Maybe the internet connections are incapable of being bridged. Also, verify that all the drivers are installed properly and are updated. Also, check and verify that Windows is updated to the latest version.

      Reply
    SP
    Sam Philips Sep 22, 2020

    I cannot connect to the Internet with an ethernet with any network program (firefox, chrome, bing, etc.). Troubleshooting couldn’t find the problem, and gave no idea of what I can do next!! MINIMALLY COMPUTER-educated NANA NEEDS HELP!!

    Reply
      MZ
      Muhammad Zubyan Author Sep 23, 2020

      Hey, Can you try the methods shown in this article and let me know the results, please?
      https://appuals.com/fix-eth…

      Reply
    JM
    Junk Mail Dec 13, 2020

    God damn… thank you for answering a question about a fundamental function of Windows OS that Microsoft leaves to be very unclear to all of it’s users. I’ve seen this question and complication go unresolved for users for as long as that function has existed; it most definitely should be delimited from that list. If it get’s automatically initiated, it’s very stupid that it remains in that list of options and should only be resevered manageable for script, programming or powershell purposes.

    Reply
    CH
    CHILL1470 Jun 7, 2021

    hello my wifi is disabled i dont know what i did, help me fix this please and also why i cant enable my hotspot it truely not that before but i before when it still working there are viruses in my pc like SSOptin and others like that. Help me fix this please.thank you

    Reply
      MZ
      Muhammad Zubyan Author Jun 7, 2021

      If you are facing these kinds of issues with your computer, I suggest you do a full clean install of your Windows as the virus may be hidden in your work files or normal Windows files because sometimes viruses integrate themselves to the “.exe” files. Also, re-installing should fix the issues you are having, if you don’t want to re-install or clean install your Windows let me know which network adaptor you have.

      Reply
    CH
    CHILL1470 Jun 9, 2021

    i dont know what is a network adaptor cuz i am not well-educated at computers

    https://uploads.disquscdn.com/images/9712de3848e49718ca5d5e8f94c1673b493b4f605482bde65d56d75346c18059.png
    here a picture that proves that there the wifi is gone while that there should be a wifi button there and a mobile hotspot button

    i cant use wifi only Ethernet

    Reply
      MZ
      Muhammad Zubyan Author Jun 9, 2021

      It’s okay please follow these steps:-

      1. Click on the Search Bar of your Windows Where it says “Type here to search”.
      2. Now in that search box type “Command Prompt”. Open the Program named Command Prompt.
      3. Once that’s done there should be a black window opened on your computer.
      4. Inside that black window type this command as it is and then press the enter key on your keyboard:-

      netcfg -d

      Note: This command will basically reset your Network settings and will most likely fix the issues you are having with you Network Adaptor.

      If it doesn’t work for you and you still don’t have WiFi try disconnecting the ethernet cable and check to see if the WiFi shows up.

      Reply
        CH
        CHILL1470 Jun 17, 2021

        I appreciate your answer and thankful for that but my Wi-Fi is now already fixed
        https://uploads.disquscdn.com/images/7b2add0ff91330e638e382e690686432d31a09d569690f9c12c525ff5e6ca4a3.png
        look

        My pc just updated itself and now the weather thing is there but the good is the Wi-Fi and hotspot is back

        and again thank you

        Reply
          MZ
          Muhammad Zubyan Author Jun 17, 2021

          Oh that’s great!

Need Help? From $35