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Ταξινομημένα προς το παρόν Κατά τελευταία ενημέρωση (αύξουσα) Ταξινόμηση χρονολογικά: Κατά τελευταία ενημέρωση
CSLIPCompressed Serial Link
Internet Protocol. Extension of SLIP that, when
appropriate, allows just header information to be sent
across a SLIP connection, reducing overhead and increasing
packet throughput on SLIP lines. | |
CSMA/CDCarrier sense multiple
access collision detect. Media-access mechanism
wherein devices ready to transmit data first check the
channel for a carrier. If no carrier is sensed for a
specific period of time, a device can transmit. If two
devices transmit at once, a collision occurs and is detected
by all colliding devices. This collision subsequently delays
retransmissions from those devices for some random length of
time. CSMA/CD access is used by Ethernet and IEEE 802.3. |
CTSClear To Send.
Circuit in the EIA/TIA-232 specification that is activated
when DCE is ready to accept data from DTE. |
cut-through packet switchingPacket switching approach that
streams data through a switch so that the leading edge of a
packet exits the switch at the output port before the packet
finishes entering the input port. A device using cut-through
packet switching reads, processes, and forwards packets as
soon as the destination address is looked up, and the
outgoing port determined. Also known as on-the-fly packet
switching. Contrast with store
and forward packet switching. | |
store and forward packet switchingPacket-switching technique
in which frames are completely processed before being forwarded out
the appropriate port. This processing includes calculating the CRC
and checking the destination address. In addition, frames must be
temporarily stored until network resources (such as an unused link)
are available to forward the message. Contrast with cut-through
packet switching. |
datagramLogical grouping of information sent
as a network layer unit over a transmission medium without prior
establishment of a virtual circuit. IP datagrams are the primary
information units in the Internet. The terms frame,
message,
packet,
and segment
are also used to describe logical information groupings at
various layers of the OSI reference model and in various technology
circles. |
data link layerLayer 2 of the OSI
reference model. This layer provides reliable transit of data
across a physical link. The data link layer is concerned with
physical addressing, network topology, line discipline, error
notification, ordered delivery of frames, and flow control. The IEEE
has divided this layer into two sublayers: the MAC sublayer and the
LLC sublayer. Sometimes simply called link layer. Roughly
corresponds to the data
link control layer of the SNA model. |
data streamAll data transmitted through a
communications line in a single read or write operation. |
DCEData communications equipment
(EIA expansion) or data circuit-terminating equipment (ITU-T
expansion). The devices and connections of a communications network
that comprise the network end of the user-to-network interface. The
DCE provides a physical connection to the network, forwards traffic,
and provides a clocking signal used to synchronize data transmission
between DCE and DTE devices. Modems and interface cards are examples
of DCE. |
decryptionThe reverse application of an
encryption algorithm to encrypted data, thereby restoring that data
to its original, unencrypted state. |
encryptionThe application of a specific
algorithm to data so as to alter the appearance of the data making
it incomprehensible to those who are not authorized to see the
information. |
default routeRouting table entry that is used to
direct frames for which a next hop is not explicitly listed in the
routing table. | |
delayThe time between the initiation of a
transaction by a sender and the first response received by the
sender. Also, the time required to move a packet from source to
destination over a given path. |
demodulationProcess of returning a modulated
signal to its original form. Modems perform demodulation by taking
an analog signal and returning it to its original (digital) form.
| |
modulationProcess by which the
characteristics of electrical signals are transformed to represent
information. Types of modulation include AM, FM, and PAM. | |
demultiplexingThe separating of multiple input
streams that have been multiplexed into a common physical signal
back into multiple output streams. | |
multiplexingcheme that allows multiple
logical signals to be transmitted simultaneously across a single
physical channel. | |
DESData Encryption Standard.
Standard cryptographic algorithm developed by the U.S. NBS. | |
destination portNumber of the called port. |
destination addressAddress of a network device that is
receiving data. |