Internetwork Operating System

Middleware is the software used to network computers. It includes network-enabled operating systems and the underlying communications software, such as implementations of TCP/IP (transmission control protocol/Internet protocol), and router software, such as CISCO S lOS (originally Internetwork Operating System) software. Mainframe and server... 

The OSI model was hrst introduced in Sec. 19.7.1 as a common framework or reference model within which protocols and networking systems could be developed with some assurance of interoperability. In this section, the OSI model provides a most effective framework in which to distinguish between the operational characteristics of the previously mentioned internetworking devices. Figure 19.62 depicts the relationship between each type of internetworking device and its related OSI layer. Each device as weU as the related OSI model layer will be explained in detail. 

For the future, to enhance user requirements and to facilitate internetworking, six levels of operator interface will need to be developed. The workstation for the future for the man-machine interface of material handling systems will probably have a variety of levels level 1, operational level 2, supervisory level 3, informational level 4, diagnostic and level 5, maintenance. 

---