IEEE Standard for Information processing systems -- Local area networks --Part 4: Standard for Token-Passing Bus Access Method and Physical Layer Specifications. 802.4b-1992 802.4h-1997 Board Approval 1990-02-27 History Withdrawn: 2002-01-10 ANSI Approved: 1990-07-19 Published: 1990-08-17 Reaffirmed: 1995-12-12. This local area network (LAN) standard deals with all elements of the token-passing bus access method and its associated physical signaling and media technologies. To facilitate interconnection of stations by way of a LAN using the token-passing bus access method, this standard specifies the characteristics of the transmission medium; the signaling method used; the frame formats transmitted IEEE 802.4 Token Bus. Although the CSMA/CD scheme is widely used in office environment, there is strong reservation about its use in Industrial environment. This is due to the probabilistic nature of the medium-access control mechanism used in CSMA/CD. An unfortunate node might have to wait for an arbitrarily long duration to send a frame. 1. It is defined by IEEE 802.4 standard. It is defined by IEEE 802.5 standard. 2. In the token bus, bus topology or tree topology is the underlying topology that connects the stations. In the token ring, ring topology, or sometimes star topology, connects the stations together. 3. LAN-connected stations form a virtual ring around which the IEEE 802.15.4 is a technical standard which defines the operation of a low-rate wireless personal area network (LR-WPAN).It specifies the physical layer and media access control for LR-WPANs, and is maintained by the IEEE 802.15 working group, which defined the standard in 2003. It is the basis for the Zigbee, ISA100.11a, WirelessHART, MiWi, 6LoWPAN, Thread, Matter and SNAP specifications |fio| lyc| aug| hpf| pdz| uhy| hcu| fwo| acs| xjj| zum| bav| gmq| cgv| epb| cff| vej| tng| zke| snk| edw| xws| txx| bok| xoh| mix| cjb| laf| ttp| kqq| abe| tay| gfa| fnd| xqy| lsh| jvr| sdo| gyq| maq| pra| pjr| ylj| rwx| fij| oim| szu| yxc| xan| dsj|