Microsoft Network Adapter Multiplexer Protocol (explained)

If you open the WI-FI Properties window on your device, you may have noticed a Microsoft Network Adapter Multiplexer Protocol option. With the default settings, the function is factory disabled on the Windows system.

Since this term sounds very technical, several questions may pop up in your mind, such as what is Microsoft Network Adapter Multiplexer Protocol? What will happen, if you have it enabled, and what it does etc.

To clarify all your queries, we have decided to cover this blog post where we will do our best to explain the Microsoft Network Adapter Multiplexer protocol to clear your confusion.


    Microsoft Network Card Multiplexer Protocol

    The Microsoft Network Adapter Multiplexer protocol is installed by default whenever the physical network is initialized for the first time. It is a kernel-mode driver primarily used for network interface connection that combines two Ethernet cards to create a single physical device.

    It helps to increase the available bandwidth or you can say it is a single configuration set that plays an important role in combining two different Ethernet connections. Each time the network interface bond is created, the Microsoft network adapter multiplexer protocol is enabled for the number of adapters that depend on their connection to the Internet.

    when to use it?

    If you're wondering where you can take advantage of Microsoft's network adapter multiplexer protocol, right? You can use it for:

    Creation of a team of adapters – In the adapter teaming process, two or more adapters are used to increase the bandwidth. So that users can send and receive more data packets.

    High Availability/Adapter Failover – In this case, another adapter takes over the network connection if the first one fails.

    Should I activate it?

    You already know that Microsoft's network adapter multiplexer protocol starts working if you mix up network adapters or create a new bridge connection. This means that this driver starts automatically when needed.

    If you try to manually enable the Microsoft Network Card Multiplexer Protocol, nothing will happen. Let's explain what's really going on:

    Navigate to the network connection folder on your computer. You can find the folder here: Control Panel > Network and Internet > Network connections.

    Here, right-click on the default network connection and select Properties.

    In the Wi-Fi properties dialog box, you will find several options, including Microsoft Network Card Multiplexer Protocol.

    Microsoft Network Card Multiplexer Protocol in Windows 10

    Now, if you check the box for this option, a prompt dialog box will appear with a message "Your current selection will also disable the following features: Microsoft Network Adapter Multiplexer Protocol“.

    Your current selection will also disable the following features: Microsoft Network Adapter Multiplexer Protocol

    if you click Yes other things are enabled for your internet connection will be disabled. Whereas, on the other hand, if you click on the Do notNothing will happen and you will be returned to the properties window with the multiplexer protocol disabled.

    So in the end we come to the conclusion that you can't enable it manually and Microsoft Network Card Multiplexer Protocol and it works automatically when you create a new bridge connection and merge network adapters.

    Do not hesitate to contact us if you want assistance with Windows or its solutions. Our team is always here to help you. (Mention 'Technical support' in the body of the email)

    About the Author

    I am a system administrator, application and website developer by profession. In the past, I also studied computer hardware and worked as a technician in a multinational organization. That's why I'm very aware of technical issues, related to computer systems and interesting things related to your devices. That's why I like to write my experience here and share it with you.

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