TCP/IP protocol stack

The Transmission Control Protocol (TCP) and the Internet Protocol (IP) refer to a non-proprietary protocol suite that enables different packet-switched networks to function as a single entity regardless of underlying network topology.

z/OS® Communications Server provides robustness and high performance with the following features:

A fully multiprocessor capable stack
Exploitation of MVS™ Reliability, Availability, and Serviceability (RAS) services
Exploitation of the z/OS architecture to optimize performance, CPU usage, and throughput
Exploitation of the z/OS Sysplex functions to maximize availability and scalability of TCP/IP workloads

In addition, z/OS Communications Server design includes a tightly integrated storage and I/O model. I/O is provided by multipath channel (MPC) for network communication; storage management is provided by Communications Storage Manager (CSM).