Performance benefits from applications other than Web and file transfers depend on the characteristics of the application , but will typically fall between these two extremes. XTP is a reliable, transport- layer protocol specifically designed to operate efficiently over high- speed networks and offers a level of performance not possible with TCP on long latency, high loss satellite links. Users should expect similar results for any large, single- connection data transfer. In contrast, TCP sends a constant stream of acknowledgments over the reverse channel. PacketShaper systems provide typical monitoring features that provide network administrators with valuable intelligence to control their application performance and maximize existing network resources. The Sky X FTP multicast facility is designed to provide multicast fan-out functionality tailored specifically for use with FTP, combining the power of multicasting with the convenience of the well-known and ubiquitous FTP utility.
The Sky X gateways are available as ready to install hardware solutions which can be added to any satellite network. While these congestion avoidance mechanisms are vital in routed environments, they are ill-suited to single-path satellite links. XTP is a reliable, transport- layer protocol specifically designed to operate efficiently over high- speed networks and offers a level of performance not possible with TCP on long latency, high loss satellite links. The journey through the atmosphere can also introduce bit errors into the data stream. Forward-looking statements involve risks and uncertainties, which could cause actual results to differ materially from those projected.
Sky X products increase the performance of IP over satellite through a combination of protocol connection-splitting, data compression, and Web pre-fetching, while remaining entirely transparent etchnology end users.
Directly control bandwidth allocation by application, server, or user to reesearch prevent congestion related application performance problems. Actual results may differ materially due to a number of factors including the perceived need for our products, our ability to convince potential customers of our value proposition, the costs of competitive solutions, continued capital spending by prospective customers and macro economic conditions.
The two Sky X gateways pass control data between each other, allowing the Sky X gateway on the opposite side of the satellite to appear to be the original source or destination device. For compressible text, Sky X consistently delivers throughput rates greater than the actual bandwidth.
When TCP protocol design limitations, high latency and lost packets threaten application connection speed, SkyX Accelerator ramps flow, fully utilizes links and keeps data moving along. So the throughput over the satellite networks is restricted to only a fraction of papeer bandwidth. In addition to the multicast benefits themselves, the Sky X gateway includes on-the-fly data compression which further increases transfer speeds for compressible data by up to 5 times.
The Sky X gateway combines protocolapplication and system level enhancements to provide maximum throughput for satellite networks.
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Bit Error Rate vs. PacketShaper systems provide typical monitoring features that provide network administrators with valuable intelligence to control their application performance and maximize existing network resources.
Replication sessions complete up to times faster and are not subject to the stalls and session drops associated with packet loss. Further, this constant stream of acknowledgments wastes precious back channel bandwidth and if the back channel is small, the return of the acknowledgments to the sender can become the system bottleneck.
Performance benefits from applications other than Web and file transfers depend on the characteristics of the applicationbut will typically fall between these two extremes.
Extensible traffic class definitions: Accelerate file transfers, large and small. For compressible dataSky X can provide throughput rates far greater than the link bandwidth.
The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 21E of the Securities and Exchange Act ofas amended, including statements regarding Packeteer’s expectations, beliefs, intentions or strategies sjyx the future.
The following file transfer tests illustrate the benefits of Sky X performance enhancement for different windows sizes, link band-widths, round-trip times, and bit error rates. Hechnology order to avoid the possibility of congestive network meltdown, TCP usually assumes that all data loss is caused by congestion and responds to this by reducing the transmission rate.
This wastes available bandwidth when it transmits at too technologyy a rate, and causes unnecessary retransmissions when it transmits at a rate higher than the bandwidth of the link.
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Traffic network utilization peak and current rates for the link and by application. Because the Sky X multicast fanout process is transparent to the end devicesany machine can originate or receive the multicast transfer regardless of operating system and without requiring the installation of any specialized multicast software. The Sky X solution is entirely transparent to end users, works with all TCP applications and does not require any modifications to end client and servers.
The journey through the atmosphere can also introduce bit errors into the data stream.
The SkyX Accelerator is available now. When TCP protocol design limitations, high latency and lost packets threaten application connection speed, SkyX Accelerator ramps flow, fully utilize links and keeps data moving along.
The Sky X system delivers the Web objects to the Sky X gateway on the client side of the satellite link where they can be served locally when requested by the browser, avoiding the satellite delay. The sender does not assume that any data is lost or corrupted until a multiple techhology the round-trip time has passed without receiving an acknowledgment.
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No changes are required to technolpgy client or server and all applications continue to function without modification. Combined with data compression and Web-specific enhancements, the Sky X system provides maximum performance under the long latency, high loss, and asymmetric bandwidth conditions typical of satellite communications. Rssearch high end SkyX Accelerator is also a 1U rack mountable appliance capable of supporting up to 80, concurrent sessions and accepts 45 Mbps of inbound traffic for compression.
By combining this reliable multicast transmission technology with a transparent fanout functionality which allows any TCP connection to be converted into a multicast transfer, the Sky X gateway marries the power of multicasting with the reserch of using FTP or any other TCP-based application. By relying on monitoring as a baselining and strategic function rather than for passive observation, PacketShaper products enable organizations to discover and classify applications, analyze their performance, and then enforce policy-based bandwidth allocation based on their business importance.
XTP is an open standard developed by the XTP Forum, a non-profit organization composed of networking protocol researchers, implementers, and user tecjnology. Window Size and Link Speed vs. But the satellite conditions adversely interact with a number of elements of the TCP architectureincluding it s window sizing, congestion avoidance algorithms, and data acknowledgment mechanisms, which contribute to severely constrict xkyx data throughput that can be achieved over satellite links.