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ZMODEM

ZMODEM is an inline file transfer protocol developed by Chuck Forsberg in 1986, in a project funded by Telenet in order to improve file transfers on their X.25 network. In addition to dramatically improved performance compared to older protocols, ZMODEM offered restartable transfers, auto-start by the sender, an expanded 32-bit CRC, and control character…

Art, Improvements & Variations

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Explore the main themes, entities and connections around ZMODEM. Start with the topic map, then use the sections below for research and deeper semantic analysis.

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Improvements

PacketsChecksumLatencyModemChannel efficiency
11 related topics

Variations

UnixISDNTCP/IPKermitRun-length encoding
10 related topics

Overview

File transfer protocolChuck ForsbergProjectTelenetX.25
13 related topics

Limitations

TelnetSsh
2 related topics

Key facts & relationships

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Developer
Chuck Forsberg
Hardware
modems
Introduction
1986; 40 years ago (1986)
Port
None
Purpose
File transfer

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Overview

Improvements

Variations

Limitations

Advanced semantic analysis

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Map overview Semantic statistics

ZMODEM

Nodes41
Edges40
Triples50
Avg. degree1.95
Density0.04878
Components1

How this topic connects Entity context

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ZMODEM

Top relations

related to Variations · 14
ZMODEM → ADONTEC, Chuck Forsberg's Omen Technology, DOS Send ZMODEM, DSZ, Graphical Send ZMODEM, GSZ, Inc, ISDN, KB, TCP/IP, The, These, Unix, ZedZap
related to Limitations · 7
ZMODEM → Even, Some, TCP/IP, This, Users, ZACK, ZRPOS
related to References · 7
ZMODEM → Chuck Forsberg, Chuck Forsberg's RZ/SZ, File Transfer Protocol DriverChat, File Transfer ProtocolThe History, SEXYZ, Synchronet External X/Y/Zmodem, The ZMODEM Inter Application
related to Restart · 7
ZMODEM → In, KB, NAK, Since, This, Windowed, XMODEM
Developer · 1
ZMODEM → Chuck Forsberg
Hardware · 1
ZMODEM → modems
Introduction · 1
ZMODEM → 1986; 40 years ago (1986)
Port · 1
ZMODEM → None
Purpose · 1
ZMODEM → File transfer
is a · 1
ZMODEM → inline file transfer protocol developed by Chuck Forsberg in 1986

Important terminology Word statistics

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Important terminology

xmodem transfer file packet protocols number send sender performance transfers packets protocol used order would modems one links receiver 25

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
ZMODEMDeveloperChuck Forsberg1.00infobox
ZMODEMHardwaremodems1.00infobox
ZMODEMIntroduction1986; 40 years ago (1986)1.00infobox
ZMODEMPortNone1.00infobox
ZMODEMPurposeFile transfer1.00infobox
ZMODEMis ainline file transfer protocol developed by Chuck Forsberg in 19860.90text
PC Pursuitinstance ofor X.25 services0.80text
where the latencies may on the order of a second or longerinstance ofor X.25 services0.80text
YMODEM-ginstance ofZMODEM's performance was so improved over previous common protocols that it generally replaced even special protocols0.80text
which included no error correction at allinstance ofZMODEM's performance was so improved over previous common protocols that it generally replaced even special protocols0.80text
instead relied on error-free links maintained by the modemsinstance ofZMODEM's performance was so improved over previous common protocols that it generally replaced even special protocols0.80text
restartable transfers made it less appealing.RestartXMODEMinstance ofthe lack of other features0.80text

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