Do you really need to tweak XP?

[jarablue]

I mean really. When I had it on default setup it was fast as hell. I think XP is tweaked for broadband out of the box. What do you guys think? Is there any evidence that it isn't setup for broadband?

[funky]

Considering most of the people are still on Dial-Ups, I find it hard to believe that Billy is gonna lowball the lower-tier customers of the internet.

[funky]

The Default Rwin is 17520, correct?

[stevenpro]

no, it's 64240

[funky]

That's intresting.. are you sure about that? Just want to know, that's all.

[Dakota]

Untweaked XP gives you this:

TCP options string = 020405b401010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 64240
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 64240
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)

bandwidth * delay product:
Your RcvWindow limits you to: 2569.6 kbps (321.2 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1027.84 kbps (128.48 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 115 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000