Resources Network support for z/OS Container Extensions New function in z/OS V2R4. Read the documentation z/OS Encryption Readiness Technology (zERT) aggregation New function APAR released in March 2018. Read the documentation AT-TLS support for TLS v1.3 New function in z/OS V2R4. Read the documentation Code page enhancements for CSSMTP New function APAR released in July 2018. Read the documentation Shared Memory Communications Reference Information A comprehensive list of reference material for SMC. Read the documentation z/OS Communications Server V2R2 New Function APAR Summary Information on z/OS Communications Server new function APARs available for z/OS V2R2. Read the documentation IBM z/OS Communications Server TCP/IP Implementation -- Volume 1 of 4 Base functions, connectivity, and routing. View the resource IBM z/OS Communications Server TCP/IP Implementation -- Volume 2 of 4 Standard applications. View the resource IBM z/OS Communications Server TCP/IP Implementation -- Volume 3 of 4 High availability, scalability, and performance. View the resource IBM z/OS Communications Server TCP/IP Implementation -- Volume 4 of 4 Security and policy-based networking. View the resource TN3270E Telnet server Express Logon support for Multi-Factor Authentication New function APAR released in March 2018. Read the documentation HiperSockets Converged Interface support New function APAR released in March 2018. Read the documentation z/OS Communications Server V2R3 New Function APAR Summary Information on z/OS Communications Server new function APARs available for z/OS V2R3. Read the documentation IBM z/OS Encryption Readiness Technology (zERT) Network Analyzer New function APAR released in December 2018. Read the documentation Communications Server support for OSA-Express7S 25 GbE features New function APAR released in March 2019. Read the documentation Communications Server support for 25 GbE RoCE Express2 features New function APAR released in December 2018. Read the documentation Expert resources to help you succeed developerWorks Explore technical topics, find trial software and join the community. Product documentation Find answers quickly in IBM product documentation.