Simple MTU Test is a MTU Maximum Packet Size Test Application. Maximum Transmission Unit or Maximum Transfer Unit the largest physical packet size measured in bytes that a network can transmit.

For example, an Ethernet MTU is 1500 bytes.

Packets that are longer than the MTU must be divided or fragmented into smaller frames. The layer 3 network protocol, typically IP, extracts the MTU from the layer 2 data link protocol such as Ethernet and fragments the messages into that frame size so that they can travel over the lower layer.

Every network has a different MTU, which is typically set by the network administrator or has a default Value set when the operating system was installed.

On Windows 95/98/XP/Vista you can set the MTU of your machine for best performance although typically the default of 1500 is usually the best.
Changing network properties for VISTA is not recommended at this time since the defaults appear to do a pretty good job already.

Ideally, you want the MTU to be the same as the smallest MTU of all the networks between your machine and a message's final destination, otherwise, if your messages are larger than one of the intervening MTUs, they will get broken up (fragmented), which slows down transmission speeds.

Trial and error is the only sure way of finding the optimal MTU, but there are some guidelines that can help.

For example, the MTU of many PPP connections is 576, so if you connect to the Internet via PPP, you might want to set your machine's MTU to 576 too.

Most Ethernet networks, on the other hand, have an MTU of 1500, which is the default MTU setting for Windows 95, 98, XP, Server and Vista.

Requirements:
* .NET Framework

The license of this software is Freeware, you can free download and free use this network utility software.