Multiple wired and wireless media-based connectivity standards have been defined, addressing the requirements of resource-constrained, low-rate field and control connectivity. Security support for wide area networks (WAN), wireless personal area network (WPAN), and local area network (LAN) communication standards is presented in this section.
IEEE 802.15.4 is an open standard for low-rate wireless personal area networks (LR-WPANs), maintained by the IEEE 802.15 working group (WPAN-TG4), which specifies the physical and media access control for LR-WPANs. This standard forms the basis for other upper-layer protocols such as Zigbee, ISA100.11a, 6LoWPAN, WirelessHART, MiWi, SNAP, and Thread specifications (WPAN-WIKI). The physical layer specification defines the RF transceiver management, channel selection, energy, and signal management functions, and supports scalable spoke-hub and point-to-point network topologies. It defines two node...