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The Window surrounded in red will appear before the test is completed. You must fill it in correctly for valid results.
Using the drop-down menus:
1. Enter the type of service that you have, in this case, Cable.
2. Enter the advertised speed from your ISP, which, in this case, is 3000kbps. If you have cable, you may have to pry this answer out of them.
3. The operating system that you use, in this case, Windows 98SE.
4. The connection type that you have, in this case, Normal. If you use PPPoE, enter which one.
The following are the only settings/readings to be concerned with:
"Receive Window" is the RWIN that your machine is actually reporting, regardless of what may be entered into your registry and DRTCP. Suggestions for this setting are given at the bottom of the test. Note that the above test is recommending a lower RWIN setting.
"Path MTU Discovery" should be ON for most every connection, or upload MTU (see "Max packet recd") will be compromised.
"Windows Scaling" is only needed when RWIN is greater than 65535. Should read "OFF" if lower than 65536.
"Time Stamping" may be used on lines that experience packet loss.
"Selective Acks" should be on.
"MSS" is the "Maximum Segment Size." In practice, that means the amount of space used in each packet to hold your "data." It is the size of the "Data Field" of your packets, generally both downloaded and uploaded packets. This should always be 40 less than your MTU (Max packet recd on tester).
"TTL" is time to live, and it should be 64 or 128 (not a speed setting!). If you use a router/firewall, the number shown may be inaccurate.
"Max packet sent" (MTU) is download and the size packet that DSLReports sent you during the test.
"Max packet recd" (MTU) is upload and the size that DSLReports received from you. If this is less than Max packet sent, your Path MTU Discovery may be OFF (seeing 576 is common if it's OFF). For PPPoE, MTU should be between 1454 and 1492. For non-PPPoE, and PPPoA, it should be 1500.
"Transfer efficiency" refers to how well the packets sent to you were received. 90-100% is considered acceptable. This will vary throughout the day and night as traffic varies on the Net.
"ICMP (ping) check" is to show basic ping packet loss. Make yourself pingable before running the test. This can show line issues not otherwise seen. Note that in this test the user was not pingable. Also note that ping is non-adjustable.
Follow FAQs suggested (if any) to fix issues noted.
As the test states at the bottom, "Still stuck? Copy/paste this URL." Please post that URL to the Tweaks Forum if you require assistance. You must also answer the other 11 questions found here.