Architecture of Internet of things ·Sensing level ·Network level ·Application level Applications: Intelligent transportation system
Architecture of Internet of things • Sensing level • Network level • Application level • Applications: Intelligent transportation system 11
Network category (Local Area Network,LAN) ·<20km (Metropolitan Area Network,MAN) 。<100km (Wide Area Network,WAN) 。>100km 12
12 Network category (Local Area Network ， LAN) • ＜20km (Metropolitan Area Network ， MAN) • ＜100km (Wide Area Network ， WAN) • ＞100km
hub stations LAN hub stations hub station Server farm Switch 13
13 LAN hub Switch Server farm station stations stations hub hub
MAN 学校的网络 政府机关的网络 网络 医院的网络 公司的网络 工厂的网络 14
14 MAN
a WAN 城市 城市 城市 城市 15
15 WAN