Packet switching and Tymnet

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Difference between Packet switching and Tymnet

Packet switching vs. Tymnet

Packet switching is a method of grouping data which is transmitted over a digital network into packets which are made of a header and a payload. Tymnet was an international data communications network headquartered in Cupertino, California that used virtual call packet switched technology and X.25, SNA/SDLC, ASCII and BSC interfaces to connect host computers (servers) at thousands of large companies, educational institutions, and government agencies.

Circuit switching

Circuit switching is a method of implementing a telecommunications network in which two network nodes establish a dedicated communications channel (circuit) through the network before the nodes may communicate.

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CompuServe

CompuServe (CompuServe Information Service, also known by its initialism CIS) was the first major commercial online service provider in the United States.

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ConnNet

ConnNet was a packet switched data network operated by the Southern New England Telephone Company serving the U.S. state of Connecticut.

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DATAPAC

DATAPAC was Canada's packet switched X.25-equivalent data network.

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Digital Equipment Corporation

Digital Equipment Corporation, also known as DEC and using the trademark Digital, was a major American company in the computer industry from the 1950s to the 1990s.

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Frame Relay

Frame Relay is a standardized wide area network technology that specifies the physical and data link layers of digital telecommunications channels using a packet switching methodology.

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IBM Systems Network Architecture

Systems Network Architecture (SNA) is IBM's proprietary networking architecture, created in 1974.

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Internet

The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.

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Internet protocol suite

The Internet protocol suite is the conceptual model and set of communications protocols used on the Internet and similar computer networks.

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MCI Communications

MCI Communications Corp. was an American telecommunications company that was instrumental in legal and regulatory changes that led to the breakup of the AT&T monopoly of American telephony and ushered in the competitive long-distance telephone industry.

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MCI Inc.

MCI, Inc. (d/b/a Verizon Business) was an American telecommunication corporation, currently a subsidiary of Verizon Communications, with its main office in Ashburn, Virginia.

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Telenet

Telenet was an American commercial packet switched network which went into service in 1974.

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Tymshare

Tymshare, Inc. was a time-sharing service and third-party hardware maintenance company competing with companies such as Four-Phase Systems, CompuServe, and Digital Equipment Corporation (DEC, Digital).

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Verizon Communications

Verizon Communications Inc., or simply Verizon, is an American multinational telecommunications conglomerate and a corporate component of the Dow Jones Industrial Average.

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X.25

X.25 is an ITU-T standard protocol suite for packet switched wide area network (WAN) communication.

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X.75

X.75 is an International Telecommunication Union (ITU) (formerly CCITT) standard specifying the interface for interconnecting two X.25 networks.

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