physical layer
121Ethernet frame — A data packet on an Ethernet link is called an Ethernet frame. A frame begins with Preamble and Start Frame Delimiter. Following which, each Ethernet frame continues with an Ethernet header featuring destination and source MAC addresses. The… …
122ZigBee — module. The €1 coin, shown for size reference, is about 23 mm (0.9 inch) in diameter. ZigBee is a specification for a suite of high level communication protocols using small, low power digital radios based on an IEEE 802 standard for personal… …
123DVD — This article is about the storage media format. For the binocular vision condition, see Dissociated vertical deviation. DVD DVD R read/write side Media type Optical disc …
124Secure Digital card — Infobox media name = Secure Digital logo = caption = Pair of SD cards type = Memory card encoding = capacity = Standard SD: 8 MB to 4 GB SDHC: 1 GB to 32 GB [pricerunner.com 2008 08 27] (theoretical max for SDHC is 2 TB.) read = write = standard …
125Device driver — Operating systems Common features …
126X.25 — is an ITU T standard network layer protocol for packet switched wide area network (WAN) communication. An X.25 WAN consists of packet switching exchange (PSE) nodes as the networking hardware, and leased lines, Plain old telephone service… …
127HiperLAN — (HIgh PErformance Radio LAN) is a Wireless LAN standard.citeweb|title=About HiperLAN/2|url=http://www.palowireless.com/hiperlan2/about.asp|publisher=palowireless.com|accessdate=2008 02 20] It is a European alternative for the IEEE 802.11… …
128IEEE 802.15.4-2006 — is a standard which specifies the physical layer and medium access control for low rate wireless personal area networks (LR WPAN s). It is maintained by the IEEE 802.15 working group.It is the basis for the ZigBee, WirelessHART, and MiWi… …
