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Connect:Direct (originally named Network Data Mover ("NDM")), is a computer software product that transfers files between mainframe computers and/or midrange computers. It was developed for mainframes, with other platforms being added as the product grew. NDM was renamed to ''Connect:Direct'' in 1993, following the acquisition of Systems Center, Inc. by Sterling Software. In 1996, Sterling Software executed a public spinoff of a new entity called Sterling Commerce, which consisted of the Communications Software Group (the business unit responsible for marketing the Connect:Direct product and other file transfer products sourced from the pre-1993 Sterling Software (e.g. Connect:Mailbox)) and the Sterling EDI Network business. In 2000, SBC Communications acquired Sterling Commerce and held it until 2010. AT&T merged with SBC effective November 2005. In 2010, IBM completed the purchase of Sterling Commerce from AT&T. ==Technology== Traditionally, Sterling Connect:Direct (previously called NDM) used the IBM Systems Network Architecture (SNA) via dedicated private lines between the parties involved to transfer the data. In the early 1990s TCP/IP support was added. Connect:Direct's primary advantage over FTP was that it made file transfers routine and reliable. IBM Sterling Connect:Direct is used within the financial services industry, government agencies and other large organizations that have multiple computing platforms: mainframes, midrange, Linux or Windows systems. In terms of speed, Connect:Direct typically performs slightly faster than FTP, reaching the maximum that the interconnecting link can support. If CPU cycles are available, Connect:Direct has several compression modes that can greatly enhance the throughput of the transfer, but care must be exercised in multi-processing environments as Connect:Direct can consume large amounts of cycles, impacting other workloads. Connect:Direct originally did not support encrypted and secure data transfers, however an add-on, ''Connect:Direct Secure+'', provided such support. Encryption can be accomplished with Transport Layer Security using SSL, TLS or Station-to-Station protocol (STS). Since being acquired by IBM, the add-on has been folded into the base product, so it always supports the latest encryption and security standards. Connect:Direct file transfers can be done in two formats: Binary mode (where no translation occurs) or in a mode where translation is used to convert an ASCII file to EBCDIC as it is moved to a mainframe or vice versa. These conversions are handled automatically based on the local systems, which is a significant concern with other file transfer software when moving between distributed and mainframe systems. Connect:Direct falls under a category of file transfer products called managed file transfer ("MFT"), which are used by businesses and government for transfer of critical electronic data. Connect:Direct supports the patented FASP™ transfer technology protocol originally developed by Aspera Software (an IBM company as of 2014). FASP (Fast And Secure Protocol) adds proprietary network congestion and packet recovery logic on top of UDP, which results in extremely fast transfers that do not interfere with TCP/IP network traffic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Connect:Direct」の詳細全文を読む スポンサード リンク
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