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Hi, refer to this quite detailed article

So assuming you have Windows OS it controls RWIN size based on 2 factors: interface speed and selected Receive Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it controls RWIN size based on 2 factors: interface speed and selected Receive Receiving Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it controls RWIN size based on 2 factors: interface speed and selected Receiving Received Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it controls control RWIN size based on 2 factors: interface speed and selected Received Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it control RWIN size chooses Scale Factor based on 2 factors: interface speed and selected Received Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it chooses Scale Factor factor based on 2 factors: interface speed and selected Received Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).

I've just checked my Win 10 with 'Normal' autotuning level and indeed it shooses Scale Scalinf Factor of 8 in every TCP connection.

Hi, refer to this quite detailed article

So assuming you have Windows OS it chooses Scale factor based on 2 factors: interface speed and selected Received Window autotuning level:

"...So, as summary, the different states for AutoTuningLevel are as follows:

Normal (Default): 0x8 (Scale Factor of 8)

Restricted: 0x4 (Scale Factor of 4)

Highly Restricted: 0x2 (Scale Factor of 2)

Disable: No scale factor available

Experimental: 0xE (Scale Factor of 14)..."

Later, after connection is established, Windows OS uses current receive rate to update RWIN size accourdingly (unlike Scaling factor which is set in SYN packets, we can change RWIN size all the time connection is active).