tag:blogger.com,1999:blog-69246809706528960982024-10-06T22:56:04.565-07:00Unknownnoreply@blogger.comBlogger60125tag:blogger.com,1999:blog-6924680970652896098.post-76044636989468482402009-04-22T10:32:00.000-07:002009-04-22T10:32:00.987-07:00

File eXchange Protocol (FXP) is a method of data transfer which uses the FTP protocol to transfer data from one remote server to another (inter-server) without routing this data through the client's connection. Conventional FTP involves a single server and a single client; all data transmission is done between these two. In the FXP session, a client maintains a standard FTP connection to two

Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-6924680970652896098.post-33451062172674743602009-04-19T23:24:00.000-07:002009-04-19T23:24:00.893-07:00

Managed File Transfer (MFT) refers to software solutions that facilitate the secure transfer of data from one computer to another through a network (e.g., the Internet). MFT solutions are often built using the FTP network protocol. However, the term specifically describes solutions that remedy the disadvantages associated with FTP.Typically, MFT offers a higher level of security and control than

Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-6924680970652896098.post-48806966840891367512009-04-18T22:19:00.000-07:002009-04-18T22:24:48.736-07:00

FTP over SSH (not SFTP) refers to the practice of tunneling a normal FTP session over an SSH connection.Because FTP uses multiple TCP connections (unusual for a TCP/IP protocol that is still in use), it is particularly difficult to tunnel over SSH. With many SSH clients, attempting to set up a tunnel for the control channel (the initial client-to-server connection on port 21) will protect only

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-80943985206430301122009-03-22T08:24:00.000-07:002009-03-22T09:49:27.352-07:00

A host which provides an FTP service may additionally provide Anonymous FTP access as well. Under this arrangement, users do not strictly need an account on the host. Instead the user typically enters 'anonymous' or 'ftp' when prompted for username. Although users are commonly asked to send their email address as their password, little to no verification is actually performed on the supplied

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-10871266693141479792009-03-09T11:53:00.000-07:002009-03-09T11:53:00.649-07:00

Connectionless and connection-oriented packet switchingThe service actually provided to the user by networks using packet switching nodes can be either be connectionless (based on datagram messages), or virtual circuit switching (also known as connection oriented). Some connectionless protocols are Ethernet, IP, and UDP; connection oriented packet-switching protocols include X.25, Frame relay,

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-71306945908875016502009-03-08T23:44:00.000-07:002009-03-08T23:44:00.694-07:00

imageThe concept of packet switching was first explored by Paul Baran in the early 1960s, and then independently a few years later by Donald Davies (Abbate, 2000).Leonard Kleinrock conducted early research in queueing theory which would be important in packet switching, and published a book in the related field of digital message switching (without the packets) in 1961; he also later played a

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-50620028652013648672009-03-05T08:53:00.000-08:002009-03-05T08:53:00.762-08:00

Packet switching is used to optimize the use of the channel capacity available in digital telecommunication networks such as computer networks, to minimize the transmission latency (i.e. the time it takes for data to pass across the network), and to increase robustness of communication.The most well-known use of packet switching is the Internet and local area networks. The Internet uses the

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-56501191209007862752009-03-03T11:39:00.000-08:002009-03-03T11:44:33.024-08:00

Packet switching is a network communications method that groups all transmitted data, irrespective of content, type, or structure into suitably-sized blocks, called packets. The network over which packets are transmitted is a shared network that routes each packet independently from all others and allocates transmission resources as needed. Principal goals of packet switching are to optimize

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-43091446267215770562008-12-11T05:28:00.000-08:002008-12-11T05:28:00.659-08:00

ConnNet was a packet switched data network operated by the Southern New England Telephone Company serving the U.S. state of Connecticut.ConnNet was the nation's first local public packet switching network when it was launched on March 11, 1985. Users could access services such as Dow Jones News Retrieval, CompuServe, Dialcom, GEnie, Delphi, Eaasy Sabre, NewsNet, PeopleLink, the National Library

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-49780135608852512382008-12-10T11:45:00.000-08:002008-12-10T11:45:01.127-08:00

OrganizationIn operation, Tymshare's Data Networks Division was responsible for the development and maintenance of the network and Tymnet was responsible for the administration, provisioning and monitoring of the network. Each company had their own software development staff and a line was drawn to separate what each group could do. Tymshare development engineers wrote all the code which ran in

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-86219394253680354622008-12-09T13:10:00.000-08:002008-12-09T13:10:00.846-08:00

EDITymshare EDI, MD Payment Systems Company, MCI EDI DepartmentTymshare was one of the pioneers in the EDI field. Under McDonnell Douglas, the Payment Systems Company continued that legacy and maintained its own network monitoring and support group. They used Tandem computers connected to a high speed data link using Tymnet as the connection and translation medium. Tymshare developed a bi-sync

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-3756332209237845832008-12-08T19:03:00.000-08:002008-12-08T19:03:00.485-08:00

Beginnings: TymshareTymshare was founded in 1964 as a time sharing company, selling computer time and software packages for users. It had two SDS/XDS 940 computers; access was via direct dial-up to the computers. In 1968, it purchased Dial Data, another time-sharing service bureau.In 1968, Ann & Norm Hardy, Bill Frantz, Joe Rinde, and LaRoy Tymes developed the idea of using remote sites with

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-63475362003371846142008-12-07T21:58:00.000-08:002008-12-07T21:58:01.277-08:00

Tymnet was an international data communications network headquartered in San Jose, California that utilized virtual call packet switched technology and used X.25, SNA/SDLC, ASCII and BSC interfaces to connect host computers (servers) at thousands of large companies, educational institutions, and government agencies. Users typically connected via dial-up connections or dedicated async connections.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-39462712446493703902008-12-06T11:54:00.000-08:002008-12-06T11:54:00.925-08:00

Asynchronous AccessUsers could use modems on the Public Switched Telephone Network to dial TAC ports, calling either from "dumb" terminals or from computers emulating such terminals. Organizations with a large number of local terminals could install a TAC on their own site, which used a dedicated line, at up to 56 kbit/s, to connect to a switch at the nearest Telenet location. Dialup modems

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-48627825781501907802008-12-05T09:49:00.000-08:002008-12-05T09:53:56.912-08:00

Telenet was a packet switched network which went into service in 1974. It was the first publicly available commercial packet-switched network service.The original founding company, Telenet Inc., was established by Larry Roberts (former head of the ARPANet), and Barry Wessler. GTE acquired Telenet in 1979. It was later acquired by Sprint and called "Sprintnet". Sprint migrated customers from

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-42823043723181906472008-09-05T00:49:00.000-07:002008-09-14T12:13:19.330-07:00

Reverse telnet is a specialized application of telnet, where the server side of the connection reads and writes data to a TTY line (RS-232 serial port), rather than providing a command shell to the host device. Typically, reverse telnet is implemented on an embedded device (e.g. terminal/console server), which has an Ethernet network interface and serial port(s). Through the use of reverse telnet

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-75474858246947523692008-09-02T19:04:00.000-07:002008-09-14T12:08:23.868-07:00

As of the mid-2000s, while the Telnet protocol itself has been mostly superseded for remote login, Telnet clients are still used, often when diagnosing problems, to manually "talk" to other services without specialized client software. For example, it is sometimes used in debugging network services such as an SMTP, IRC, HTTP, FTP or POP3 server, by serving as a simple way to send commands to the

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-59494159620185522182008-08-30T03:59:00.000-07:002008-09-14T12:03:36.598-07:00

When Telnet was initially developed in 1969, most users of networked computers were in the computer departments of academic institutions, or at large private and government research facilities. In this environment, security was not nearly as much of a concern as it became after the bandwidth explosion of the 1990s. The rise in the number of people with access to the Internet, and by extension,

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-2767192439122830732008-08-27T20:55:00.000-07:002008-09-14T11:58:58.739-07:00

Telnet is a client-server protocol, based on a reliable connection-oriented transport. Typically this protocol used to establish a connection to TCP port 23, where a getty-equivalent program (telnetd) is listening, although Telnet predates TCP/IP and was originally run on NCP.Initially, Telnet was an ad-hoc protocol with no official definition. Essentially, it used an 8-bit channel to exchange

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-19767921402764294252008-08-23T11:51:00.000-07:002008-09-14T11:55:15.858-07:00

Telnet (Telecommunication network) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in 1969 beginning with RFC 15 and standardized as IETF STD 8, one of the first Internet standards.The term telnet also refers to software which implements the client part of the protocol. Telnet clients are available for virtually all platforms. Most network

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-37415073411849285582008-08-21T16:10:00.000-07:002008-08-21T16:10:00.799-07:00

SSH is typically used for logging into remote servers so you have shell access to do maintenance, read your email, restart services, or whatever administration you require. SSH also offers some other native services, such as file copy (using scp and sftp) and remote command execution (using ssh with a command on the command line after the hostname).Whenever we SSH from one machine to another, we

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-13918702658604474372008-08-20T00:34:00.000-07:002008-08-20T00:34:00.219-07:00

An SSH tunnel (sometimes referred to as a VPN) is an encrypted network tunnel created through an SSH connection. SSH is frequently used to tunnel insecure traffic over the Internet in a secure way. For example, Windows machines can share files using the SMB protocol, which is not encrypted. If you were to mount a Windows filesystem remotely through the Internet, someone snooping on the connection

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-73034907967096867542008-08-19T08:48:00.000-07:002008-08-19T08:48:00.527-07:00

Hand drawn Diagram about SSH tunneling

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-54162091977316940392008-08-18T13:58:00.000-07:002008-08-18T13:58:01.038-07:00

The term tunneling protocol is used to describe when one network protocol called the payload protocol is encapsulated within a different delivery protocol. Reasons to use tunnelling include carrying a payload over an incompatible delivery network, or to provide a secure path through an untrusted network.Tunneling typically contrasts with a layered protocol model such as those of OSI or TCP/IP.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-6924680970652896098.post-46927014885368037032008-08-17T06:42:00.000-07:002008-08-17T06:42:01.011-07:00

Also known as a patch cord, a patch cord is a piece of copper wire or fiber optic cable that connects circuits on a patch panel.A patch cable or patch cord (sometimes patchcable or patchcord) is an electrical or optical cable, used to connect ("patch-in") one electronic or optical device to another for signal routing. Devices of different types (ie: a switch connected to a computer, or switch to

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