Combo Box

The combo box lets you select the TCP/IP key that will have it's MaxMTU value altered. Each key can have a different value for MaxMTU. The effect can be modified by use of  the "Apply MTU value to all TCP keys?" checkbox.

How the keys are displayed depends on whether the program is run in WinNT or Win95 and, if you are running MTUSpeed in Win95, which algorithm is used to find TCP.

MTUSpeed uses 2 algorithms to detect TCP. If the first isn't able to find TCP it automatically uses a second. If that fails to find TCP you will get a warning mewssage.