Virtual terminal
Encyclopedia
In open systems
, a virtual terminal (VT) is an application service that:
PuTTY
is an example of a virtual terminal.
ITU-T
defines a virtual terminal protocol based on the OSI
application layer
protocols. However, the virtual terminal protocol is not widely used on the Internet.
Open system (computing)
Open systems are computer systems that provide some combination of interoperability, portability, and open software standards. The term was popularized in the early 1980s, mainly to describe systems based on Unix,...
, a virtual terminal (VT) is an application service that:
- Allows hostServer (computing)In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients"...
terminals on a multi-userUser (computing)A user is an agent, either a human agent or software agent, who uses a computer or network service. A user often has a user account and is identified by a username , screen name , nickname , or handle, which is derived from the identical Citizen's Band radio term.Users are...
networkComputer networkA computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information....
to interact with other hosts regardless of terminalComputer terminalA computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system...
type and characteristics, - Allows remote log-on by local area network managers for the purpose of management,
- Allows users to access informationInformationInformation in its most restricted technical sense is a message or collection of messages that consists of an ordered sequence of symbols, or it is the meaning that can be interpreted from such a message or collection of messages. Information can be recorded or transmitted. It can be recorded as...
from another host processorCentral processing unitThe central processing unit is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer. The term has been in...
for transaction processing, - Serves as a backup facility.
PuTTY
PuTTY
PuTTY is a free and open source terminal emulator application which can act as a client for the SSH, Telnet, rlogin, and raw TCP computing protocols and as a serial console client...
is an example of a virtual terminal.
ITU-T
ITU-T
The ITU Telecommunication Standardization Sector is one of the three sectors of the International Telecommunication Union ; it coordinates standards for telecommunications....
defines a virtual terminal protocol based on the OSI
Open Systems Interconnection
Open Systems Interconnection is an effort to standardize networking that was started in 1977 by the International Organization for Standardization , along with the ITU-T.-History:...
application layer
Application layer
The Internet protocol suite and the Open Systems Interconnection model of computer networking each specify a group of protocols and methods identified by the name application layer....
protocols. However, the virtual terminal protocol is not widely used on the Internet.
See also
- TelnetTELNETTelnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communications facility using a virtual terminal connection...
- Terminal emulatorTerminal emulatorA terminal emulator, terminal application, term, or tty for short, is a program that emulates a video terminal within some other display architecture....
for an application program that provides access to virtual terminals - Pseudo terminalPseudo terminalIn some operating systems, including Unix, a pseudo terminal is a pseudo-device pair that provides a text terminal interface without an associated device, such as a virtual console, computer terminal or serial port...
for the software interface that provides access to virtual terminals - Virtual consoleVirtual consoleA virtual console – also known as a virtual terminal – is a conceptual combination of the keyboard and display for a computer user interface. It is a feature of some operating systems such as UnixWare, Linux, and BSD, in which the system console of the computer can be used to switch between...
for an analogous concept that provides several local consoles