latency


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latency

[′lat·ən·sē]
(computer science)
The waiting time between the order to read/write some information from/to a specified place and the beginning of the data-read/write operation.
(medicine)
The stage of an infectious disease, other than the incubation period, in which there are neither clinical signs nor symptoms.
(physiology)
The period between the introduction of and the response to a stimulus.
(psychology)
The phase between the Oedipal period and adolescence, characterized by an apparent cessation of psychosexual development.

latency

(communications)
1. The time it takes for a packet to cross a network connection, from sender to receiver.

2. The period of time that a frame is held by a network device before it is forwarded.

Two of the most important parameters of a communications channel are its latency, which should be low, and its bandwidth, which should be high. Latency is particularly important for a synchronous protocol where each packet must be acknowledged before the next can be transmitted.

latency

(1) Essentially any delay or lapse in time. In general, it is the time between initiating a request in the computer and receiving the answer. Data latency may refer to the time between a query and the results arriving at the screen or the time between initiating a transaction that modifies one or more databases and its completion.

Disk latency is the time it takes for the selected sector to be positioned under the read/write head. Channel latency is the time it takes for a computer channel to become unoccupied in order to transfer data. Network latency is the delay introduced when a packet is momentarily stored, analyzed and then forwarded.

(2) With malicious software, latency is the period between infection and the first obvious damage to the host system. Many viruses or logic bombs written by amateurs have a short latency and are therefore relatively easy to detect; however, more vicious malware can lie dormant or replicate to many other hosts and then wreak havoc unexpectedly. See logic bomb and virus.
References in periodicals archive ?
In this study, the effects of network latency in CVEs through various feedback based on task distribution model was thoroughly evaluated.
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The case of our second patient, who developed a laryngeal postirradiation sarcoma, is noteworthy not only because of the short latency period (2 yr), but also because of the ultrastructural characteristics of the two neoplasms.
Our commitment to enabling real-time, fault-tolerant messaging solutions is reflected in our history, our strong partnerships with industry leading companies, and our early support of the zero latency enterprise concept," said Tom Laffey, Talarian's co-founder and chief technology officer.
360), and in studying latency in other viral infections.
This report is written for decision-makers and strategists at telecommunications service providers looking for insights into and analysis on the emerging and rapidly developing Low Latency services market.
5 millisecond latency further shortens the already lowest JPX-SGX latency
Infinera (Nasdaq:INFN) announced on Monday that Colt has deployed Infinera low-latency optical networking systems to support low latency services on its next generation pan-European network.
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Worldwide Computer Products News-18 April 2006-Kingston Technology introduces Low Latency DDR2 memory modules and expands Ultra Low Latency(C)1995-2006 M2 COMMUNICATIONS LTD http://www.