| podobné slovo | definícia |
expenditure switching policy
(encz) | expenditure switching policy, |
mode switching
(encz) | mode switching,změna způsobu [eko.] RNDr. Pavel Piskač |
portfolio switching
(encz) | portfolio switching, |
switching
(encz) | switching,přepíná n: Zdeněk Brožswitching,přepínání n: Zdeněk Brož |
switching policy
(encz) | switching policy, |
Switching engine
(gcide) | Switching \Switch"ing\,
a. & n. from Switch, v.
[1913 Webster]
Switching engine, a locomotive for switching cars from one
track to another, and making up trains; -- called also
switch engine. [U.S.]
[1913 Webster] |
Switching power supply
(gcide) | Switching power supply \Switch"ing power supply\, n.
a device used as part of an electronic device, which
transforms electrical current from an AC line circuit to DC
for use in electronic devices, and which can use either 110
volt or 220 volt AC line curent.
[PJC] |
switching
(wn) | switching
n 1: the act of changing one thing or position for another; "his
switch on abortion cost him the election" [syn: switch,
switching, shift] |
circuit switching
(foldoc) | circuit switching
circuit switch
circuit switched
Communication via a single dedicated path
between the sender and receiver. The telephone system is an
example of a circuit switched network.
The term connection-oriented is used in packet-based
networks in contrast to connectionless communication or
packet switching.
(2006-09-20)
|
cut-through switching
(foldoc) | cut-through switching
The application of wormhole routing to
packets in a packet switching system so that forwarding of
a packet starts as soon as its destination is known, before
the whole packet has arrived.
Compare store and forward.
(2006-12-06)
|
data link switching
(foldoc) | Data Link Switching
DLSw
(DLSw) A standard for transporting IBM {Systems
Network Architecture} (SNA) and {network basic input/output
system} (NetBIOS) traffic over an Internet protocol network.
Initially, in 1992, DLSw was proprietary to IBM. It was
submitted to the IETF as RFC 1434 in 1993, later updated
by RFC 1795.
(http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dlsw.htm).
(2008-01-11)
|
label switching
(foldoc) | label switching
A routing technique that uses information from
existing IP routing protocols to identify IP datagrams
with labels and forwards them to a modified switch or
router, which then uses the labels to switch the datagrams
through the network.
Label switching combines the best attributes of {data link
layer} (layer two) switching (as in ATM and Frame Relay)
with the best attributes of network layer (layer three)
routing (as in IP).
Prior to the formation of the MPLS Working Group in 1997, a
number of vendors had announced and/or implemented proprietary
label switching.
(2007-10-17)
|
label switching router
(foldoc) | Label Switching Router
(LSR) A device that typically resides somewhere
in the middle of a network and is capable of forwarding
datagrams by label switching. In many cases, especially
early versions of MPLS networks, a LSR will typically be a
modified ATM switch that forwards datagrams based upon a
label in the VPI/VCI field.
(1999-06-14)
|
message switching
(foldoc) | store and forward
message switching
(Or "message switching") A kind of {message
passing} system where a complete message is received before
any of it is passed on to the next node. This means that each
message is using at most one interprocessor link at any time
but intermediate nodes will require more storage buffers than
under the alternative, wormhole routing.
E-mail transmission is an example of store and forward
message passing.
(1995-02-16)
|
multiprotocol label switching
(foldoc) | Multiprotocol Label Switching
MPLS
(MPLS) A packet switching protocol developed
by the IETF. Initially developed to improve switching
speed, other benefits are now seen as being more important.
MPLS adds a 32-bit label to each packet to improve
network efficiency and to enable routers to direct
packets along predefined routes in accordance with the
required quality of service. The label is added when the
packet enters the MPLS network, and is based on an
analysis of the packet header. The label contains
information on the route along which the packet may travel,
and the forwarding equivalence class (FEC) of the packet.
Packets with the same FEC are routed through the network
in the same way.
Routers make forwarding decisions based purely on the contents
of the label. This simplifies the work done by the router,
leading to an increase in speed. At each router, the label
is replaced with a new label, which tells the next router
how to forward the packet. The label is removed when the
packet leaves the MPLS network.
Modern ASIC-based routers can look up routes fast enough to
make the speed increase less important. However, MPLS still
has some benefits. The use of FECs allows QoS levels to
be guaranteed, and MPLS allows IP tunnels to be created
through a network, so that VPNs can be implemented without
encryption.
MPLS Resource Center (http://mplsrc.com/).
[RFC 3031]
(2002-04-14)
|
name service switching
(foldoc) | Domain Name System
name service switching
(DNS) A general-purpose distributed, replicated,
data query service chiefly used on Internet for translating
hostnames into Internet addresses. Also, the style of
hostname used on the Internet, though such a name is
properly called a fully qualified domain name. DNS can be
configured to use a sequence of name servers, based on the
domains in the name being looked for, until a match is found.
The name resolution client (e.g. Unix's gethostbyname()
library function) can be configured to search for host
information in the following order: first in the local {hosts
file}, second in NIS and third in DNS. This sequencing of
Naming Services is sometimes called "name service switching".
Under Solaris is configured in the file /etc/nsswitch.conf.
DNS can be queried interactively using the command nslookup.
It is defined in STD 13, RFC 1034, RFC 1035, RFC 1591.
BIND is a common DNS server.
{Info from Virtual Office, Inc.
(http://virtual.office.com/domains.html)}.
(2001-05-14)
|
nodal switching system
(foldoc) | Nodal Switching System
(NSS) Main routing nodes in the NSFnet backbone.
|
number 5 electronic switching system
(foldoc) | Number 5 Electronic Switching System
5ESS
(5ESS) An electronic circuit switching product
sold by Alcatel Lucent (formerly Western Electric/{AT&T
Network Systems}/Lucent Technologies), used by many telephone
exchange carriers and service providers. Succeeded the Number 4
Electronic Switching System (4ESS) and reached widespread use in
the 1980s.
Not to be confused with the Class 5 Switch.
(2013-09-14)
|
packet switching
(foldoc) | packet switching
packet switch
packet-switched
A communications paradigm in which packets
(messages or fragments of messages) are individually routed
between nodes, with no previously established communication
path. Packets are routed to their destination through the
most expedient route (as determined by some routing
algorithm). Not all packets travelling between the same two
hosts, even those from a single message, will necessarily
follow the same route.
The destination computer reassembles the packets into their
appropriate sequence. Packet switching is used to optimise
the use of the bandwidth available in a network and to
minimise the latency. X.25 is an international standard
packet switching network.
Also called connectionless. Opposite of circuit switched
or connection-oriented. See also virtual circuit,
wormhole routing.
(1999-03-30)
|
switching
(foldoc) | switching
Establishing the correct path through a network
for a single packet of data (packet switching) or a
persistent end-to-end connection (circuit switching).
(2007-08-16)
|
switching hub
(foldoc) | switching hub
A circuit switching hub.
(1999-01-01)
|