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 ?
About McKay Brothers, LLC McKay Brothers is a private, independent specialty microwave telecommunications company dedicated to designing, engineering, building and operating best-in-class low latency networks connecting financial centers.
The company expects to reduce latency further as well as expand its European network during the first quarter.
As the leading provider in low latency solutions, QuantHouse is dedicated to delivering advanced latency monitoring solutions for today's high-speed marketplace.
The joint solution, Endace NinjaProbe with Correlix Latency Intelligence, integrates latency monitoring and analysis software into a multi-function probe and sensor.
With traditional approaches, troubleshooting and resolving network latency issues can take from hours to weeks.
Network latency calculations take into consideration the processing time required by network adapters to process and transmit (or receive) the packet, as well as the latency in the interconnect network, which includes cable length, load on the network and the processing latency of the interconnect switch.
Most authors have reported long latency periods prior to the development of postirradiation sarcomas, although cases that occurred within 3 years have been noted.
Any strategy that advances the Zero Latency Enterprise allows businesses that implement it to sell more product, deliver better customer service and capitalize on new business opportunities sooner than their competitors," said Roy Schulte of Gartner Group who has been working on ZLE for four years.
In the animal models for herpes, it's less clear what latency is,' he says.
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.
In addition, McKay Brothers first European microwave link is live, connecting the UK with Frankfurt at the lowest known latency.
Memory products manufacturer Kingston Technology Company Inc has revealed that it has expanded its Ultra Low Latency DDR modules and introduced Low Latency DDR2 memory modules.