 When you download a file from a web page, it is broken into many packets of data before it is sent over the World Wide Web to your computer (where it is then reassembled). The size of these packets are called your MTU value, or the Maximum Transfer Unit. Your downloads from any web page or any application will be slow and disappointing if this value is not set correctly.  Each packet that is sent over the Internet contains a header which contains a variety of information about the packet, source, and destination. Setting your computer's MTU value too low would make the Internet speed slower and downloading less efficient because a greater percentage of the packet is taken up by the packet header. However, setting the MTU too high can also decrease Internet efficiency. Other computers on the Internet might not be able to handle MTU values of a certain size. If you set your computer's MTU value too high, some computers along the delivery path would be required to break these packets into smaller pieces before accepting them and passing them to the next computer. This “Stop. Break. Go.” processing of packets can dramatically slow down data transfers.
It is usually best to let our Internet speed software figure out and select this setting for you by using the Intelligent Mode. However, the QuickOptimization panel in ActiveSpeed's Internet accelerator and optimizer program will let you  select the setting you want quicker, without having to go through the entire Learning Phase again. Expert users and experienced network engineers may also make their own adjustments to the accelerator and optimizer program by using the detailed optimization panel. This is just one of the settings that ActiveSpeed software will optimize to accelerate your Internet speed and allow your computer to download web pages quicker.
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