HSLINK
Encyclopedia
HS/Link is a file transfer
File transfer
File transfer is a generic term for the act of transmitting files over a computer network or the Internet. There are numerous ways and protocols to transfer files over a network. Computers which provide a file transfer service are often called file servers. Depending on the client's perspective the...

 protocol
Communications protocol
A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications...

 developed by Samuel H. Smith in 1991-1992. HS/Link is a high speed, full streaming, bidirectional, batch file transfer protocol with advanced Full-Streaming-Error-Correction. Each side of the link is allowed to provide a list of files to be sent. Files will be sent in BOTH directions until both sides of the link are satisfied.

HS/Link is not just another bidirectional protocol, it is also a very fast protocol for normal downloading and uploading, incorporating some new ideas (such as Full-Streaming-Error-Correction and Dynamic-Code-Substitution) to make things happen a bit faster and with greater reliability.
HS/Link operates at or very near peak efficiency, often reaching 98% or more with pre-compressed files and non-buffered modems. Even higher speeds are possible with buffered or error correcting modems. A number of features, such as fast 32bit CRC
Cyclic redundancy check
A cyclic redundancy check is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data...

protection, Full-Streaming-Error-Recovery and Dynamic-Code-Substitution, combine to give maximum performance and security.

HS/Link can resume an aborted transfer, verifying all existing data blocks to insure the resumed file completely matches the file being transmitted. This function can also update a file that has only a small number of changed, added, or deleted blocks. An additional feature allowed both remote and local user to chat depending on the file transfer bandwidth(s).

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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