| slovo | definícia |
ethernet
(encz) | ethernet, n: |
ethernet
(wn) | ethernet
n 1: a type of network technology for local area networks;
coaxial cable carries radio frequency signals between
computers at a rate of 10 megabits per second |
ethernet
(foldoc) | Ethernet
A local area network first described by
Metcalfe & Boggs of Xerox PARC in 1976. Specified by DEC,
Intel and XEROX (DIX) as IEEE 802.3 and now recognised
as the industry standard.
Data is broken into packets and each one is transmitted
using the CSMA/CD algorithm until it arrives at the
destination without colliding with any other packet. The
first contention slot after a transmission is reserved for
an acknowledge packet. A node is either transmitting or
receiving at any instant. The bandwidth is about 10 Mbit/s.
Disk-Ethernet-Disk transfer rate with TCP/IP is typically 30
kilobyte per second.
Version 2 specifies that collision detect of the transceiver
must be activated during the inter-packet gap and that when
transmission finishes, the differential transmit lines are
driven to 0V (half step). It also specifies some {network
management} functions such as reporting collisions, retries
and deferrals.
Ethernet cables are classified as "XbaseY", e.g. 10base5,
where X is the data rate in Mbps, "base" means "baseband"
(as opposed to radio frequency) and Y is the category of
cabling. The original cable was 10base5 ("full spec"),
others are 10base2 ("thinnet") and 10baseT ("twisted
pair") which is now (1998) very common. 100baseT ("{Fast
Ethernet}") is also increasingly common.
Usenet newsgroup: news:comp.dcom.lans.ethernet.
(http://wwwhost.ots.utexas.edu/ethernet/ethernet-home.html).
(1997-04-16)
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| | podobné slovo | definícia |
ethernet cable
(encz) | ethernet cable, n: |
ethernet cable
(wn) | ethernet cable
n 1: any of several types of coaxial cable used in ethernets |
ethernet address
(foldoc) | Ethernet address
(Or "MAC address") The physical address
identifying an individual Ethernet controller board. An
Ethernet addess is a 48-bit number aabbccddeeff where a-f are
hexadecimal digits. The first 24 bits, aabbcc, identify the
manufacturer of the controller. The Ethernet address is
hard-wired on some controllers, stored in a ROM on some, and
others allow it to be changed from software. It is usually
written as six hexadecimal numbers, e.g. 08:00:20:03:72:DC.
See also ARP, Internet address.
(1996-02-21)
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ethernet meltdown
(foldoc) | Ethernet meltdown
A network meltdown on Ethernet.
(1994-11-29)
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ethernet private line
(foldoc) | Ethernet Private Line
(EPL) A data service defined by the {Metro
Ethernet Forum}, providing a point-to-point Ethernet
connection between a pair of dedicated User-Network Interfaces
(UNIs), with a high degree of transparency.
(2010-09-21)
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fast ethernet
(foldoc) | Fast Ethernet
A version of Ethernet developed in the 1990s(?)
which can carry 100 Mbps compared with standard Ethernet's
10 Mbps. It requires upgraded network cards and hubs.
The relevant standards are 100BaseT, 100BaseFX and
100BaseVG.
(1998-03-23)
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full-duplex switched ethernet
(foldoc) | full-duplex Switched Ethernet
FDSE
(FDSE) A Switched Ethernet link which can carry
data in both directions simultaneously, doubling transmission
capacity from the usual 10 to 20 megabits per second.
(1996-06-20)
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point-to-point protocol over ethernet
(foldoc) | Point-to-Point Protocol over Ethernet
PPPoE
(PPPoE) The protocol defined in
RFC 2516 that allows one or more computers to connect to the
Internet via a shared modem. The computers connect to the
modem via a local area network such as Ethernet and the
modem connects to an Internet Service Provider (ISP) via a
serial connection such as PPP over ADSL.
PPPoE provides each user with a connection that looks and
behaves like a point-to-point dial-up connection even though
they are actually sharing an Ethernet or wireless network.
At the same time, the ISP only needs to provide a single
Internet connection, with the same kind of accounting as for
PPP. Also, the IP address is only assigned when the PPPoE
connection is open, allowing the dynamic reuse of IP addresses
via DHCP.
PPPoE works by encapsulating PPP frames in Ethernet
frames.
(2006-09-20)
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thick ethernet cable
(foldoc) | RG8
thick Ethernet cable
The original "full spec" cable used for
10base5 Ethernet networks. RG8 is stiff, large diameter
coaxial cable with an impedance of 50 ohms, a member of the
"Radio Guide" series. The outer sheath is usually yellow, to
indicate double shielding, so it is often just called "yellow
cable".
10base5 cable is designed to allow transceivers to be added
while existing connections are live. This is achieved using a
"vampire tap".
RG8 is sometimes called "thicknet" or "thick Ethernet" in contrast
to RG58, a cheaper, thinner, more flexible alternative.
(2014-09-06)
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thin ethernet cable
(foldoc) | RG58
thin Ethernet cable
A common, low-impedance (52 ohm),
quarter-inch diameter coaxial cable with BNC connectors,
used for 10base2 Ethernet wiring, sometimes called
"cheapernet" in comparison with "full spec" RG8 cabling.
A member of the "Radio Guide" series.
(2002-06-17)
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