Greetings,

I am Erin, content designer for z/OS Communications Server.

A free online course is now available to refresh your TCP/IP on z/OS knowledge. 
This course covers the overview of TCP/IP Protocol, 
including network layers, protocols at each layer, and the hardware that 
facilitates the transport of data. It also awards an open badge.

If you are interested, check it out: 
https://learn.ibm.com/course/view.php?id=6239

Thanks,
Erin

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