ITU‐T's Technical Reports and Specifications 361 Figure 7 – A multi‐tier SSC ICT architecture from a software engineering point of view 7.1.2 A communications view of the SSC ICT architecture The communications view examines various ways of structuring communications facilities to simplify the SSC ICT planning and design. It examines the networking elements of the architecture in the light of geographic constraints, bandwidth requirements, and so on. Various alternatives can be followed to establish communications between SSC ICT architecture subsystems: 1. Cable networks (fiber‐optic, coal‐based networks within the city, etc.) installed in SSC; 2. Wireless networks (WiFi, WiMax, GSM, 4G mobile networks, etc.) installed in SSC; 3. Peer‐to‐Peer connections between SSC ICT architecture sub‐systems; 4. Distributed Object Management (DOM); All the above alternatives are organized in three groups regarding the network geographical range (Figure 8): 1. Global or wide area networks (i.e., across the SSC); 2. Regional area networks (i.e., neighborhoods of the SSC); 3. Local area networks (i.e., within a building of block of the SSC); Presentation layer thin‐client, CDE, Win32, JVM etc.SSC User interface Application Logic SSC service analysis and provision Data Access Data access interface Data Store SQL, DRDA, ODBC