The OSI Flashcards
Reference model as an open standard for every communication system to allow interlinking of different types of networks.
Open Systems Interconnection
In what year was OSI developed?
1984
What organization used the OSI as a reference model?
International Organization for Standardization
Give the seven layers of the OSI Models.
Physical
Data Link
Network
Transport
Session
Presentation
Application
Gives electrical and mechanical connections to the network. (Handles signal and media)
Physical layer
Handles error recovery, flow control, and sequencing of terminals that are either sending or receiving. It is the media access control (MAC) layer where MAC addressing is defined. (Assigned for the flow of data)
Data link layer
Acts as the network controller that receives outgoing messages and combines messages and segments into pockets with a header detailing the routing information. (Provides addressing and routing decisions)
Network layer
Liable for end-to-end delivery between devices. It deals with message integrity between source and destination and segmenting and reassembling packets. (Manages end-to-end delivery to ensure error-free packets)
Transport layer
Provides the control functions required to start, manage, and end connections to satisfy user requests. (Establishes, manages, and terminates sessions)
Session layer
Accepts and structures the messages for an application by converting the message from one code to another. It also processes data compression and encryption. (Manages protocol conversion and data translation)
Presentation layer
It interacts with application programs with communication components such as web browser and email. It is responsible for recording a message, understanding the request, and identifying the information needed to support it. (Provides support for application)
Application layer
