using these programs without knowing anything, is useless
or u have a better way , use any MTU setting software,
or use System Mechanic's Netbooster to set all the recommended values, u just need to select the type of connection u have and the software will apply all the recommened settings required for ur type of connection !
wanna know more?........read ahead .................
Specify Maximum Transfer Unit (MTU)-----------
MTU is the default "packet size" (amount of data) that Windows uses to send and receive information over the Internet or across your network. When your computer establishes a connection with another computer over the Internet or your LAN, the two computers must use a common MTU value to send and receive data. The computer with the lowest MTU value determines the value that both must use. If the MTU value that is used is larger than that used by any network routers between the computers, these routers must split the data packets into chunks that they can handle, thus causing network fragmentation. This type of data fragmentation can actually double the amount of time it takes to send a single packet of information. You can dramatically increase performance by setting Window’s MTU manually.
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Tcp Receive Window Size-----------------------------
The TCP Receive Window size (RWIN) is the amount of data (in bytes) that can be received before the sender must await confirmation that the data arrived properly. Another element that is directly relevant to this parameter is the Maximum Segment Size (MSS), which is the maximum amount of data that may be received in one network segment at one time, which is calculated as the MTU value minus 40 bytes (40 bytes are allocated for basic TCP and IP information in each segment). Setting the TCP Receive Window size to even increments of the MSS increases the percentage of full-sized data segments used during transmission, which results in more efficient downloading, uploading, and network-based data exchanges.
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Default Time to Live------------------------------------
Default Time To Live (TTL) is a parameter included with each segment of transmitted data. TTL indicates how long the data should be allowed to "survive" before being discarded. TTL is based on the number of "hops" (or network server transitions) that the data segment can travel over before it considers itself to be a transmission failure. The larger the TTL value, the greater the chance that data will eventually arrive at its destination. However, a TTL that is too large may result in unnecessary delays when data is destined to fail due to network errors.
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Suggested values
MTU suggested values
The key to increasing performance using the MTU is to attempt to match its value with that of your ISP as closely as possible. Some helpful ISPs will readily provide this information if asked, which will save you a great deal of experimentation.
For dial up connections:
As a general rule, most users with dial-up connections experience better results with an MTU value specifically set to 576.
For cable, xDSL, LAN and other dedicated connections:
Most people with faster, dedicated connections experience the best performance with an MTU value of 1500.
For cable, xDSL, LAN and other dedicated connections using PPoE:
In order to gain maximum performance, set the MTU to 1492.
Note: If you have two or more network interface cards (NIC) in your PC, the values above should be applied to the NIC used for your internet connection.
RWIN suggested values
The RWIN default is 8192 bytes, rounded up to the nearest Maximum Segment Size (MTU - 40) increment for the connection. If that value isn't at least 4 times the MSS, it is adjusted to 4 times the MSS, with a maximum size of 64K (unless TCP large window support is enabled, in which case the maximum value is 1 gigabyte). If the Windows 95 default MaxMTU of 1500 is used, the default RWIN is rounded up to 8760 (1460 * 6).
In some cases, manually setting RWIN may decrease performance because it takes control away from Windows. If the MTU is negotiated to a different value, then the size of the RWIN is no longer a whole integer multiple. For this to be effective you must make sure your MTU is set so that it will not be negotiated to a lower value.
For dial up connections:
Performance can be drastically improved by setting this to a lower value such as 4 times your MSS (MTU-40). The goal with dial-up networking is to bring it to a value below the default 8192. You may have better success with 6, 8 or even 10 times the MSS value.
For cable, xDSL, LAN and other dedicated connections:
At the recommended MTU value of 1500, a good RWIN value to start with under Windows 98 or greater is 372300, using 255 as a multiplier for your MSS (maximum segment size), calculated at your MTU value - 40, which in this case is (1500 - 40) * 255. Under Windows 95 or NT4 without Winsock updates, the maximum and recommended RWIN value to start with would be 64240, calculated with a multiplier of 44.
Other values that have been reported to work well with high-speed connections are the following:
• 513920, or 352 times your MSS at an MTU of 1500 (must be using Windows 98 or greater to use this value)
• 256960, or 176 times your MSS at an MTU of 1500 (must be using Windows 98 or greater to use this value)
• 128480, or 88 times your MSS at an MTU of 1500 (must be using Windows 98 or greater to use this value)
• 93440, or 64 times your MSS at an MTU of 1500 (must be using Windows 98 or greater to use this value)
• 64240, or 44 times your MSS at an MTU of 1500
• 32120, or 22 times your MSS at an MTU of 1500
• 8760, or 6 times your MSS at an MTU of 1500
TTL suggested values
As the Internet grows, the average number of required data transmission "hops" increases, which increases the effectiveness of a larger TTL value. Recommended values, in order of preference, are 128, 64, and 32.
Blackhole detection suggested value
This setting is applicable only if Automatic MTU detection is enabled. The need for blackhole detection is rare due to the fact that the average equipment used on the Internet will support automatic MTU detection if necessary, and setting this parameter when it is not needed can cause performance degradation. It must be noted, however, that if you are experiencing slow data transfers with this setting unchecked, it might be helpful to experiment with it turned on to see if you experience better results. Blackhole detection is disabled by default.
Automatic MTU detection suggested value
Since automatic MTU detection helps in determining the MTU of the remote connection, it can greatly improve performance. This option should remain enabled unless experimentation reveals that your particular connection operates more efficiently without it.
Support for TCP large windows suggested values
Enabling this feature greatly enhances the Windows’ ability to accept more data at once. It is recommended that you use this to its full advantage by selecting the option labeled 3 - Window Scaling and Timestamp Options. This setting is only available under Windows 98 or later.
Fast retransmission and recovery support suggested values
Recommended setting is 3.This setting is only available under Windows 98 or later.
Support for Selective Acknowledgements suggested value
Since Selective Acknowledgement is a performance enhancing option, it is recommended that this option be enabled. This setting is only available under Windows 98 or later.
Number of Allowed Simultaneous HTTP Connections
Best results can usually be achieved by setting the HTTP 1.0 connection limit to 10 and the HTTP 1.1 limit to 8.
