Microsoft KB Archive/141965

Mac Works 4.0: Description of File Transfer Protocols

PSS ID Number: Q141965 Article last modified on 10-22-1998

4.0 4.0a 4.0b

MACINTOSH

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========================================================= 4.0 4.0a 4.0b MACINTOSH kbusage

= SUMMARY =

This article describes the four different types of file transfer protocols available in the Works 4.0 Communications module.

= MORE INFORMATION =

MS Text
This protocol is used to transfer ordinary text files such as word processing documents. This protocol is fast and simple to use. However, this protocol does not deal well with phone line disturbances and can cause words to become lost or garbled if there is line noise. The other protocols deal with these disturbances more effectively.

MS X/Y Modem
This is a widely used protocol with error-checking capabilities. There are five different variations of this tool available in Works. These variations are available in the Method box after you select the X/Y Modem protocol. The variations are listed below:

XModem CRC This method uses 128K blocks with improved error checking.

XModem 1k This method is faster than CRC with the same error checking.

Ymodem This method is slightly faster than Xmodem. It is best used when you are unsure of the other computer’s abilities.

Ymodem-g This is the fastest option, but does not work well if there is a lot of line noise.

MS Kermit
This is another widely used protocol. Kermit allows for either 7 or 8 data bits. Some computers cannot handle the 8th bit required by other protocols. Because Kermit can use 7 data bits it can connect to these computers. The Sliding Windows method in the Kermit protocol allows it to send continuous streams of data while receiving responses at the same time. This allows for faster data transfer.

MS Zmodem
This is the newest protocol. It is designed to be faster and more efficient than YModem-g. MS ZModem provides the following two protocol variations:

Window This is the slowest ZModem method. It should be used when the other computer does not support Full Streaming.

KBCategory: kbusage KBSubcategory: macworkskb Additional reference words: 4.0, 4.0a, 4.0b mac m_works comm modem phone connections settings mwkscomm kbhowto ====================================================================== Version : 4.0 4.0a 4.0b Platform : MACINTOSH ============================================================================= Copyright Microsoft Corporation 1998.