Introduction to the New Mainframe: z/VSE Basics

406 Introduction to the New Mainframe: z/VSE Basics

17.2.2 Layered network models

TCP/IP and SNA are both layered network models. Each can indirectly map to

the international

Open Systems Interconnect (OSI) network model (Figure 17-1).

Figure 17-1 Open Systems Interconnect (OSI) network model

The OSI network model depicts the organization of the individual elements of

technology involved with end-to-end data communication. As shown in

Figure 17-1, the OSI network model provides some common ground for both

SNA and TCP/IP. While neither technology maps directly into the OSI network

model (TCP/IP and SNA existed before the OSI network model was f ...