In a data communication network

Telecommunications network

A telecommunications network is a collection of terminals, links and nodes which connect together to enable telecommunication between users of the terminals. Networks may use circuit switching or message switching. Each terminal in the network must have a unique address so messages or connections...

, the primary station is the station responsible for unbalanced control of a data link

Data link

In telecommunication a data link is the means of connecting one location to another for the purpose of transmitting and receiving information. It can also refer to a set of electronics assemblies, consisting of a transmitter and a receiver and the interconnecting data telecommunication circuit...

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The primary station generates commands and interprets responses, and is responsible for initialization of data and control information

Information

Information 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...

 interchange, organization and control of data flow, retransmission control, and all recovery functions at the link level

Link level

Link level: In the hierarchical structure of a primary or secondary station, the conceptual level of control or data processing logic that controls the data link....

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