Internetwork Packet Exchange support is the AS/400 implementation of the NetWare communication protocols. These protocols include IPX, Sequenced Packet Exchange (SPX), Router Information Protocol (RIP), Service Advertising Protocol (SAP), and NetWare Link Service Protocol (NLSP). Other related NetWare functions are also included. This set of communications protocols supports peer-to-peer connectivity functions in both local area networks and wide area networks.

What is Systems Network Architecture

In IBM networks, Systems Network Architecture (SNA) is the layered logical structure, formats, protocols, and operational sequences that are used for transmitting information units through networks. SNA also controls the configuration and operation of networks.

APPC, APPN, and HPR are some examples of the protocols included within SNA. They can be used to connect the AS/400 with other IBM systems, or non-IBM systems, to connect remote controllers, and to maintain a high-level of security on your system.

What is TCP/IP

Transmission Control Protocol/Internet Protocol (TCP/IP) is a set of network protocols that enables computers to share resources and exchange information across a network. TCP/IP allows hosts to communicate with each other regardless of the host or user’s physical location, the operating system, or the network medium. TCP/IP operates in many different network environments, that include the Internet and corporate Intranets.

For more information, see the topic TCP/IP configuration fastpath.

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IBM AS/400 manual What is Systems Network Architecture, What is TCP/IP

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.