Networking on z/OS
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TCP/IP implementation on the mainframe

Networking on z/OS

z/OS Communications Server implements TCP/IP in a network-attached z/OS system and among multiple systems in a z/OS cluster or Parallel Sysplex.

  • TCP/IP on z/OS
    TCP/IP on z/OS supports all of the well-known server and client applications.
  • TCP/IP in a sysplex
    A sysplex is a cluster of tightly-coupled independent instances of the z/OS operating system. The internal communications within a sysplex are facilitated by the Coupling Facility. TCP/IP takes advantage of the Coupling Facility and Workload Manager to optimize availability and load balancing in a sysplex.

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