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Change the Number of Simultaneous HTTP Sessions (All Windows) Popular

Windows normally limits the number of simultaneous connections made to a single web server. This behavior can be seen in Internet Explorer when downloading multiple files from a web site and only a certain number will be active at any one time.

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Windows will limit connections to a single HTTP 1.0 server to four simultaneous connections. Connections to a single HTTP 1.1 server will be limited to two simultaneous connections. The HTTP 1.1 specification (RFC2068) mandates the two connection limit while the four connection limit for HTTP 1.0 is a self-imposed restriction which coincides with the standard used by a number of popular Web browsers.

Open your registry and find the key below.

Create two new values, or modify the existing values, called 'MaxConnectionsPerServer' and 'MaxConnectionsPer1_0Server'. Change the values to equal the number of simultaneous requests allowed to a single HTTP server, the default values are 2 and 4 respectively.

Restart Windows for the change to take effect.

Note: By changing these settings you are causing Windows to break the HTTP protocol specification for any Internet applications running on your machine.

Note: This affects all Windows Internet applications that use the standard API, including Internet Explorer.

		(Default)	REG_SZ	(value not set)
		MaxConnectionsPerServer	REG_DWORD	0x00000005 (5)
		MaxConnectionsPer1_0Server	REG_DWORD	0x00000005 (5)

	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\...

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Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.