Panasonic FP-D250 User Manual page 585

Error control A means of ensuring that information received across a transmission
link is correct. The techniques involved typically use error detection to detect if the
transmitted data has been corrupted. The error control technique involves asking for
data to be retransmitted until a correct version is received.
Ethernet The most widely LAN transmission network. Based on a bus network
topology, it runs at a maximum 10Mbit/s - in practice far less - and adopts CSMA/CD
techniques operating over convention co-axial cable, thin wire co-axial cable and
unshielded twisted pair cabling. A fiber-optic implementation has also been defined.
Originally developed by Xerox, Intel and Dec, Ethernet has moved through V1 and
V2 proprietary definitions, and has now been standardized by the IEEE as the IEEE
802.3 standard. This has several implementations - 10Base5 for use over conventional
co-axial cable, 10BaseF for use over optic fiber, and 10BaseT for use over Unshielded
Twisted Pair (UTP) cabling.
Ethernet switching A technique inspired by Kalpana bringing the advantages of a
parallel networking architecture to current contention- based Ethernet LANs. Each
LAN can be segmented, each with its own 10Mbit/s path. When users on different
segments exchange data, an Ethernet switch dynamically connects the two separate
Ethernet channels without interfering with other network segments. The switch can
create multiple independent connections between separate segments, allowing
multiple parallel data exchanges. This multiplies network bandwidth without
modification to Ethernet end station hardware or software. Once disparaged by other
vendors, it now forms part of the portfolio of the major hub and router manufacturers.
F
Fast Ethernet Proposed 100Mbit/s technology for workstation LANs from the
eponymous Fast Ethernet Alliance, which includes 3Com and SynOptics. It has been
adopted by the IEEE as the basis for the 100BaseT Ethernet standard.
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