The Session layer is responsible for connection negotiation and
establishment. The Session Control module performs the following functions:
o Manages transport connections on behalf of Session Control users.
o Enforces access control policies to restrict communication between users
and between Session Control modules.
o Maps from a DNA Naming Service object name to protocols and addresses.
o Selects from the set of protocols supporting Session Control to attempt
connection establishment.
o Maintains in the namespace the protocol and address information
corresponding to objects that reside in the same node as the local
Session Control module.
The hierarchy of Session Control Module Entities is shown with indentation
as follows:
Session Control
Applications
Ports
Tower Maintenance
Transport service
Backtranslation softlink
The Session Control entity is the top-level entity in the hierarchy of
entities belonging to the Session Control module.
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