Abbreviations

Results for area 5.3 Transmission characteristics

term
port number
definition

identifier of an application-entity to a transport service in the internet suite of protocols

NOTE The concept of port numbers is often present in OSI literature; however, port numbers are not inter-network standardized, but exist as local network conventions only.

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term
datagram
definition

entity of data containing enough information to be routed from source to destination without relying on previous network configuration

EXAMPLE IP datagram.

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term
data packet
definition

entity of data that can be sent between end-application systems in order to exchange information

NOTE A data packet relates to the Application Layer of the OSI stack and may be broken into several pieces by lower layer protocols.

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term
message instance
definition

specific instance of an end application message

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term
session
definition

period of time during which a client and a server exchange multiple data packets

term
message specification
definition

documentation defining the meaning of a message

NOTE The result of applying a given standard to a specific message.

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term
message sets
definition

set of basic messages that are normally used in business-oriented applications

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term
end application message
definition

message data structure that has been associated with a specific meaning and which, when properly sent in a data packet, an instance of the structure can convey information between systems

NOTE A data structure might, for example, be specified to include a list of speeds from detector stations. This one data structure could be used to specify the content of several messages (e.g. the list of current speeds being detected, the list of stored speeds that will trigger a congestion warning if current values fall below the indicated level, or a request for a list of locations where the current speed is less than the indicated speed). An instance of the message would then contain actual values.

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term
file
definition

data storage object, which may be located on any file system such as a hard-disk, a floppy-disk, a RAM-drive, etc.

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term
internet protocol (RFC 791) (IP)
definition

the network protocol offering a connectionless mode network service in the Internet suite of protocols

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term
user datagram protocol (UDP)
definition

connectionless protocol from the TCP/IP set , belonging to the transport layer; similar to TCP, it uses protocol IP, but does the delivery without confirmation

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