158 ITU‐T's Technical Reports and Specifications Figure 5 – A multi‐tier SSC ICT architecture from communications view, emphasizing on an information flow perspective Both the given figures concern valid representations of the same architecture view, one closer to the language of infrastructure developers and the second more in line with the information system developer’s context. The architecture view contains the following layers (as depicted in Figure 4): Sensing layer: This layer consists of terminal node and capillary network. Terminals (sensor, transducer, actuator, camera, RFID reader, barcode symbols, GPS tracker, etc) sense the physical world. They provide the superior “environment‐detecting” ability and intelligence for monitoring and controlling the physical infrastructure within the city. The capillary network (including SCADA, sensor network, HART, WPAN, video surveillance, RFID, GPS related network etc.) connects various terminals to network layer, providing ubiquitous and omnipotent information and data. Network layer: The network layer indicates various networks provided by telecommunication operators, as well as other metro networks provided by city stakeholders and/or enterprise private communication network. It is the information superhighway (infobahn), the network layer data and support layer. The data and support layer makes the city “smarter”, its main purpose is to ensure the support capabilities of various city‐level applications and services. Data and support layer contain the data centers from industries, departments, enterprises, as well as the municipal dynamic data center and data warehouse (etc), established for the realization of data process and application support. Cyber‐security users layer end‐users (demand side: i.e., inhabitants)end‐users (supply side: i.e., stakeholders' representatives)presentations layer applications layer (software applications offering SSC services)Transportation, E‐government, E‐business, Safety and Emergency, Smart health, Tourism, Education, Smart Building, Waste management , Smart Energy, Smart water business layer (business processes that simulate service logic)Communications Network layer Transport network (SDH, DWDM, IP, Microwave etc.)Access network (xDSL, FTTx, WiFi, 2G/3G/4G, PLC etc.)data layer Data repositories File repositories sensing layer Capillary Network (SCADA, sensor network, HART, WPAN, video surveillance, RFID, Barcode, GPS, etc.Terminal node (sensor, transducer, actuator, camera, RFID tag, barcode symbols etc.