Network Xpress

News
Products
Support
Research
Solutions
Services
Overview
Customers
Staff
Contact Us

NetX Solutions

Data distribution to multiple destinations:

Multicast allows a single transmitter to send data to any number of receivers. XTP supports any number of multicast groups (one transmitter per group), so we also support NxN multicasting (N transmitters, N receivers, N groups).

Reliable data transfer:

Unicast and multicast both support 100% reliable transmission with transparent error correction.

Transactions:

XTP supports fast, efficient, reliable transaction processing using only three packets for a reliable exchange.

Datagrams:

XTP provides either the traditional unacknowledged datagram, or a new, fast, efficient service called the "reliable datagram" – a one time message, but guaranteed to arrive at its destination.

Knowledge of receivers:

Multicast group management allows the transmitter to know everything or nothing about the membership of the multicast group. When errors occur (such as a receiver failure), application-defined semantics determine whether the group halts, or continues with one fewer member.

Traffic shaping and congestion control:

Rate control optionally limits the transmitter to producing no more than "rate" bytes/second. Burst control optionally limits the transmitter to producing no more than "burst" bytes per transmission. These limits are dynamically adjustable to achieve traffic shaping and/or congestion avoidance.

Long-latency links:

XTP’s sequence space of 2^64 bytes assures that the protocol will not collapse into a stop-and-wait protocol just because there are many unacknowledged messages outstanding.

High-error-rate environments:

Selective retransmission can resend only the data reported missing by the receiver; it need not restart the data stream from the last acknowledged byte (as with go-back-n retransmission). This make the protocol much more efficient than TCP when repairing errors.

Fragmentation avoidance:

XTP’s method of Maximum Transmission Unit (MTU) discovery allows the transmitter to determine the maximum size packet that will not trigger fragmentation by IP; future packet transmissions can then be guaranteed to be no longer than the MTU limit.

Multi-level security:

Unlike TCP which requires bi-directional transmission between correspondents, XTP can be configured to require absolutely no information from the receiver. This allows a lower security level application (e.g., "secret") to talk to a higher security level application (e.g., "top secret") without any chance of data leakage in the reverse direction. The reverse channel can be physically removed.

 


 

Network Xpress

Telephone: (804) 293-8066

 

webmaster@netx.com

FAX: (804) 293-8414