Wolfgang Johannsen

Learn More
Companies’ IT Systems are confronted with constantly changing market conditions, new competitive threats and a growing number of legal regulations. The service-oriented architecture (SOA) paradigm provides a promising way to address these challenges at the level of a company’s IT infrastructure. These challenges, as well as the management of the newly(More)
IT-Outsourcing-Dienstleister bieten Unternehmen an, bislang intern erbrachte Leistungen der IT bei gleicher Qualität zu einem definierten und damit kalkulierbaren Preis zu erbringen. Gleichzeitig verfügen Fachabteilungen über eigene IT-Kompetenz und entwickeln Applikationen eigenständig, manchmal ganz ohne Beteiligung der Unternehmens-IT. Diese sieht sich(More)
The authors report on architectural alternatives and an implementation design of an open systems LAN/WAN (local area network/wide-area network) gateway which connects a private (IBM token ring) LAN with a open WAN based on a public X.25 packet-layer protocol. The gateway design applies and generalizes the ideas underlying the ISO Open Systems(More)