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TCP Fast OPEN – Citrix NetScaler

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TCP Fast OPEN – Citrix NetScaler
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TCP Fast Open (TFO) is a TCP mechanism that enables speedy data exchange between a client and a server during TCP’s initial handshake. By using the TFO mechanism, you can reduce an application’s network latency by the time required for one full round trip, which significantly reduces the delay experienced in short TCP transfers.

So how does it work? This picture describes it alot better!

It is important however that we need to have a supported client and a supported server to make this feature work. This feature was introduced in NetScaler 11.1 as it just needs some configuration to be able to work properly.

This can be done by adjusting a TCP Profile with the TCP Fast Open value

We can also define how long the TCP cookie should be used, by default this is set to zero (Which is defined in the TCP parameters on the NetScaler.

Read the entire article here, TCP Fast OPEN – Citrix NetScaler

via Marius Sandbu.

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IT Blog by Marius Sandbu Marius Sandbu (@msandbu on Twitter), works as an Cloud Architect at Exclusive Networks/BigTec in Norway. Primary focusing on Software defined datacenter solution and how they integrate with end-user computing technology and also works alot with cloud solutions like Microsoft Azure. Marius is also an Microsoft MVP, Veeam Vanguard, VMware vExpert and is also the author of many Citrix NetScaler books and shares his thought and ideas about technolgy on his blog.

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