uality ervice - A measurement of the service provided to a user. In ATM networks, QoS measurements related to traffic can be divided into two categories: cell level and connection level. In ST2 (Internet Stream) Protocol, the QoS must satisfy data rate and delay characteristics of specific packet streams.
Ability of a network element (e.g., an application, host, or router) to have some level of assurance that its traffic and service requirements can be satisfied.
A negotiated contract between a user and a network provider that renders some degree of reliable capacity in the shared network.
This is an effort to provide different prioritization levels for different types of traffic over a network. Text or still images can be sent in bursts just as long as the whole file is eventually displayed as a whole. However, video and VoIP need to be received at the same rate they were recorded. Transmission of multimedia has necessitated more sophisticated packet prioritization, sorting, queuing and scheduling to improve QoS and insure the integrity of whatever is being sent.
Term to describe delay, throughput, bandwidth, etc. of a Virtual Connection.
Quality of Service. Required to support wireless multimedia applications and advanced traffic management. QoS enables Wi-Fi access points to prioritize traffic and optimize the way shared network resources are allocated among different applications. Without QoS, all applications running on different devices have equal opportunity to transmit data frames. That works well for data traffic from applications such as web browsers, file transfers, or e-mail but it is inadequate for multimedia applications. Voice over Internet Protocol (VoIP), video streaming, and interactive gaming are highly sensitive to latency increases and throughput reductions and require QoS. QoS extensions for 802.11 networks will be addressed in the upcoming IEEE 802.11e standard. (See 802.11e, WMM). close
Quality Operating System Also called BOS: Business Operating System. A data driven system to analyse and measure the performance in order to improve the strategic positioning of the business, the product and the process.
Quality of Service. A term used to describe the performance properties of a service, especially guaranteed throughput level.
Quality of Service Search Engine Optimization The process of increasing the amount of visitors to a Web site by ranking high in the search results of a search engine. The higher a Web site ranks in the results of a search, the greater the chance that site will be visited by a user.
Quality of service, i.e., CBR, UBR, etc.
Stands for Quality of Service. It is the ability to define a level of performance.
Quality of Service refers to the measure of service quality provided to the user.
Quality of Service. QoS can be used to describe any number of ways in which a network provider guarantees a service's performance, such as an average or minimum throughput rate.
Quality of service. A set of intelligent features that enables the network to classify, mark, and prioritize traffic, reducing congestion and bringing order to the flow of data and services.
A mechanism for guaranteeing performance in delivery of specified data transmissions across a network. This enables sufficient control over performance to allow for constant bit rate applications to work well across a data network. This mechanism is available only in an ATM environment.
Quality of Service, performance specification of a communications channel or system or the rating of telephone communications quality in which listeners judge transmissions by qualifiers, such as excellent, good, fair, poor, or unsatisfactory. A general term that incorporates bandwidth, latency, and jitter to describe a network's ability to customize the treatment of specific classes of data. For example, QoS can be used to prioritize video transmissions over Web-browsing traffic. Advanced networks can offer greater control over how data traffic is classified into classes and greater flexibility as to how the treatment of that traffic is differentiated from other traffic.
Quality of Services. A measure of the service quality for a telecommunication service. This typically involves the specification of latency, jitter, loss, availability etc...
(Quality Of Service) a defined level of performance in a data communications system. For example, to ensure that realtime voice and video are delivered without annoying blips, a guarantee of bandwidth is required. The plain old telephone system (POTS) has delivered the highest quality of service for years, because there is a dedicated channel between parties.
Quality of Service QoS denotes the ability to provide some guarantee and differentiation of performance between different classes of traffic on a network. This is becoming very important over IP, especially for voice and video applications.
Quality of Service Back to the Top
Quality of Service, a networking term that specifies a guaranteed throughput level. One of the biggest advantages of ATM over competing technologies such as Frame Relay and Fast Ethernet , is that it supports QoS levels. This allows ATM providers to guarantee to their customers that end-to-end latency will not exceed a specified level.
Quality of Service. QOS is a parameter of UMTS for a certain constant quality of data transfer such as a minimum bandwidth, constant bit rate etc. With UMTS becoming a standard in 2003, the billing is planned to be made according to QOS.
Quality of Service -- a policy (e.g. loadbalance) used to connect nodes in a network in order to ensure highly dependable transmission. QoS is an issue that often arises in high-availability ( HA) networks as well as realtime control systems.
Quality of Service refers to both a network's ability to deliver data with minimum delay, and the networking methods used to provide bandwidth for real-time multimedia applications.
Quality of Service pertains to the quality of a connection and this is especially important for connections relaying voice since the user feels the impact immediately. A retransmission cannot make up for the lost data. The internet protocol was devised as a .best effort. data network and thus it does consider jitter, latency or even data loss a problem. Ergo, it does not handle voice well per se. To make the transmission of voice possible it must be given the necessary priority and bandwidth. There are mechanisms for reserving bandwidth (see RSVP) but they add network equipment with an additional burden of handling this functionality and slow down establishing connections. The other pragmatic approach to this problem is to acknowledge that normally the access point (interconnection between LAN and WAN) is the most critical section. By prioritising the packets (see ToS) (of course the network equipment has to Support this) and ensuring that the access point is not overloaded good QoS can be achieved. The data traffic load in the backbone is about 10 times that of voice (thanks to WWW) of carriers so this should not be the problem.
Quality of Service. The ability to provide guarantees for data transfer -- for example, latency, throughput, and discard priority.
Quality of Service. Measure of performance for transmission systems that reflects their transmission quality and service availability.
An effort to provide different prioritization levels for different types of traffic over a network. Various methods are used to achieve quality of service,...
Quality of Service. A definition of a given level of service for voice or data communication services by the provider.
Quality of Service which includes technical performance parameters like differential phase, latency, phase jitter or error distribution, together with worst-case performance values for each.
Quality of service. QoS on wireless LANs provides prioritization of traffic from the access point over the WLAN based on traffic classification. The benefits of QoS become more obvious as the load on the wireless LAN increases, keeping the latency, jitter, and loss for selected traffic types within an acceptable range.
quality of service. Sometimes abbreviated QoS.
Quality of Service Interactive video conferencing requires a high QoS. QOS is important as it determines the quality of your video call. Low quality of service results in latency and a jerky picture with poor and inconsistent audio quality.
quality of service. QoS usually refers to the prioritization of packets over a network.
(or QOS) Quality of Service
Quality of Service. The ability to define a level of performance in a data communications system. For example, ATM networks specify modes of service that ensure optimum performance for traffic such as real-time voice and video. QoS has become a major issue on the Internet as well as in enterprise networks, because voice and video are increasingly traveling over IP-based data networks that were not designed for continuous speech or video. A high QoS would ensure that the packets of data all arrive in time for undetectable reassembly. Return
Quality of Service. Measure of performance for a transmission system that reflects its transmission quality and service availability. Standards based QOS for VoIP usually involves the implementation of ethernet standards 802.1p and 802.1q at layer 2 across an Ethernet. At layer 3, the IP standard DiffServ defines bits settings in the TOS (type of service) in the IP header which will identify packets as being associated with a specific service.
Refers to the quality of the voice call over a VoIP network. A major issue in VoIP communications, because the high quality of telephone calls has always been taken for granted. Latency, packet loss, network jitter, and many other factors contribute to QOS measurements, and numerous solutions have been offered by vendors of routers and other network components.
Quality of Service (QoS) is the theory that Internet transmission rates, error rates, and other features can be surveyed, improved, and guaranteed in advance.
Refers to a subjective level of acceptable voice quality under all conditions such as congested networks or concurrent voice and data on the wireless LAN.
Quality of Service - Qualitative measure of the performance of a network. New technologies such as IPv6 can prioritise data with a number of QoS levels.
The idea that transmission rates, error rates and other characteristics can be measured, improved and, to some extent, guaranteed in advance.
Quality of Service. QoS allows network managers to decide how and what network traffic is forwarded according to priorities, application types, and source and destination addresses.
Quality of Service (QoS) is a collection of policies and mechanisms designed to control and enhance communication properties, such as bandwidth, latency, and jitter. -- Pattern-Oriented Software Architecture: Patterns for Concurrent and Networked Objects, Schmidt, Doug, et al.
Quality of Service. A guarantee of timely and safe delivery of packets over a network.
Quality of Service. A technique used within IP to prioritise data traffic upon a network. By setting Video Conference data traffic with a high priority it ensure that the sessions are not interrupted by other data on the network.
In relation to leased lines, Quality of Service is a contractual guarantee of uptime and bandwidth.
(Quality of Service) - A description of sound, video, or data transmission quality in a network or communications channel. QoS is a quantitative measure used as a baseline to predict the performance of a given network or channel.
quality of service. A set of parameters that describes a flow of data, such as guaranteed bandwidth, delay, and delivery guarantee.
Measure of the telephone service quality provided to a subscriber. QoS refers to things like: Is the call easy to hear? Is it clear? Is it loud enough
Quality of Service On the Internet and in other networks, QoS is an attempt to prioritize certain types of traffic for a better performance or more even transmission.
Quality of Service - QoS is the set of techniques to manage network resources. QoS enables you to provide better service to certain flows. This is done by either raising the priority of a flow or limiting the priority of another flow.
Quality of Service. The capability of a network to provide better service to selected network traffic over various technologies, including Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet and 802.1 networks, SONET, and IP-routed networks that may use any or all of these underlying technologies. The primary goal of QoS is to provide priority including dedicated bandwidth, controlled jitter and latency (required by some real-time and interactive traffic), and improved loss characteristics.
Acronym for Quality of service; end-to-end QoS with a minimum of delay or loss is a requirement to consider when converting from a PSTN to VoIP network.
Quality of Service. A given Quality of Service level is sometimes required for a given user being tunneled between an LNS-LAC pair. For this scenario, a unique L2TP tunnel is created (generally on top of a new SVC) and encapsulated directly on top of the media providing the indicated QOS.
Quality of Service. This term talks about the parameters that characterize the traffic in a virtual conección. R-r
Quality of Service is a networking term that specifies a guaranteed throughput level. Often used to imply application availability as well as bandwidth and other qualities (see SLA).
Quality of Service, a characteristic of data transmission that measures how accurately and how quickly a message or data is transferred from a source computer to a destination computer over a network.
uality ervice, method to define the importance/priority of network services
Quality of service, in an IP network it's the technique of prioritizing packets carrying voice data over those carrying other data to improve the quality of VOIP and video service()
Quality of Service, a measurable set of parameters that define the level of service that a service provider can be held accountable for
Quality of Service. There are many meanings for this term, but they generally revolve around guarantees of service levels for Internet connections. With respect to VPNs, QoS generally means the amount of throughput and/or the number of simultaneous connections that can be sustained over a connection that uses IPsec.
Quality of Service. A networking term that specifies a guaranteed throughput (the amount of data transferred from one place to another or processed in a specified time) level. QoS is required for time sensitive network application use. outer - A network device that examines the network addresses within a given protocol, determines the most efficient pathway to the destination, and then routes the data accordingly. Operates at the Networking Layer of the OSI model.
quality of service (ATM network channels)
Quality of service. The ability of a network, whether the network is a complex network, small corporate network, Internet service provider (ISP), or enterprise network, to provide better service to selected network traffic over various technologies, including Frame Relay, ATM, Ethernet and 802.1 networks, and SONET, as well as IP-routed networks that may use any or all of these underlying technologies.
Quality of Service. A subjective term used to measure the "quality of service" of a product or service offered by a carrier. Also used in reference to certain products specifically, such as ATM. ATM is a "quality of service" product since it provides different levels of quality depending on which type of data you want to transmit, such as voice, data or video. You need a higher quality of service (constant stream of data) if you want to transmit video, than if you do if you want to send and receive intermittent data ("bursty" stream of data).
Quality of Service (QoS) refers to the capability of a network to provide better service
Quality of Serivice Quality of Service is a software inclusion in many routers that allows the user to prioritise the upstream bandwidth for a particular device. In this way, you can give a device such as an ATA priority over other internet traffic so that the quality of the VoIP call is maintained. This is important because most broadband connections have a smaller upstream bandwidth than the downstream bandwith. Information about QoS is available on this site on the Routers page.
The ability of a network (including applications, hosts, and infrastructure devices) to deliver traffic with minimum delay and maximum availability.
A measure of the quality of a network connection, factoring availability, latency, speed, and reliability. Using QoS-aware protocols, networks can guarantee certain QoS levels on a by-service basis, allowing sensitive traffic priority over less urgent traffic. See Diffserv. Back
Quality of Service. The service level defined by a service agreement between a network user and a network provider, which guarantees a certain level of bandwidth and data flow rates.
Quality of service is a measure of the ability to control and assign network bandwidth to specific traffic so as to provide predictable levels of IP-based data throughput based on the importance of the business process associated with that traffic.
Quality of Service; measurable features of a service describing its quality (e.g. maximal response time, minimal transfer capacity, minimal qualification of staff)
Quality of Service. A measure of how reliable a carrier's service is. Usually expressed in terms of availability and measured, as how often available, by .99999 or five nines, which is the top level of reliability.
Quality of Service: Is a standard which defines how speech packets are handled in a computer network environment. To maintain speech quality all elements in a network, such as routers and switches, supporting VOIP should be QOS compliant
Quality of Service; specification of certain characteristics of network services, sessions, connections, or links.
Short for Quality of Service. A minimum performance standard of a network's data transmission rate, bandwidth, latency or other measurement identified by the network provider.
Quality of Service. A measure of the telephone service quality provided to a subscriber.
Quality of Service. Network traffic management concept for controlling throughput and adjusting priorities for specified applications, TCP / UDP ports and customers.
Quality of Service; the ability to guarantee transmission characteristics end-to-end
Quality of service. Performance, such as transmission rates and error rates, of a communications channel or system.
quality of service (relates to networks)
Quality of Service; a guaranteed or predictable level of bandwidth, transmission speed, and freedom from dropped packets, delay, jitter, and error that is necessary to ensure adequate performance of particular applications.
Quality of Service - In circuit-switched networks it refers to the probability of being able to initiate a call to another party. In packet-switched networks it refers to the probability of the network meeting a given traffic contract, or in many cases is used informally to refer to the probability of a packet passing between two points in the network.
Broad term to describe various methods used to provide for different prioritization levels for different types of traffic over a digital network such as Ethernet. See RSVP protocol.
In networking, a concept by which applications may indicate their specific requirements to the network, before they actually start transmitting information data. Implicit QoS means that the application chooses the required levels of QoS. Explicit QoS means that the network manager controls that decision.
Quality of Service; a measure of the delivered service quality. It is measured by one or more metrics.