Background Info
When created
Late 1970s
Application Layer
Where the user interacts with the computer
Application Layer
Physical, Data Link, Network, Transport, Session, Presentation, Application
When a host transmits data across a network to another device, the data goes through this. The data is wrapped with protocol information at each layer of the OSI model.
Encapsulation
Physical or conceptual model
Conceptual
Physical Layer
Layer 1
Responsible for setting up, managing, and then tearing down sessions
Session Layer
Three-Way Handshake
SYN, SYN/ACK, ACK
This protocol is considered reliable transmission
Transmission Control Protocol (TCP)
Model is broken into these
Layers
Presentation Layer
Layer 6
This layer uses MAC addresses
Data Link Layer
Addressing order from Layer 2 to Layer 3
MAC to IP
This protocol is considered unreliable transport
User Datagram Protocol (UDP)
Why created
so vendors' networks could become compatible
Network Layer
Layer 3
This layer uses IP addressing
Network Layer
OSI Layers from top to bottom Layers 7 to 1
Application, Presentation, Session, Transport, Network, Data Link, Physical
In this form of flow control, data is sent in groups of segments that require only one acknowledgment.
Windowing
Name of organization that created ISO Model (Complete name not acronym)
International Organization for Standardization
Transport Layer
Layer 4
Maintains flow control through buffering or windowing
Transport Layer
Correct order for encapsulation
Data, Segment, Packet, Frame, Bits
The two sublayers of the Data Link Layer
Media Access Control (MAC) and Logical Link Control (LLC)