Customer Service and Booking Hotline: +44 (0) 845 672 0175




A generic term for the transfer of data and control information between two adjacent layers and sublayers within a protocol stack. It is conventionally represented as a function invocation, with the data and control information passed as parameters.

Bookmark this glossary item

Share this item using the following sites:

Courses by category...

Glossary Search

Newsletter Sign-up

Our RSS Feeds...