7-Layer OSI Model Word Scramble

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7-Layer OSI Model

Layer	Function
Layer 7	Application
Layer 7	provides network services to application processes (such as e-mail, file transfer & terminal emulation)
Layer 7	the interface that allows the application (program) to communicate
Layer 6	Presentation
Layer 6	Like an interpreter
Layer 6	Data representation
Layer 6	ensure that data is readable by the receiving system
Layer 6	format of data
Layer 6	data structures
Layer 6	negotiates data transfer syntax for application layer
Layer 5	Session
Layer 5	interhost communication
Layer 5	establishes, manages, and terminates sessions between application
Layer 4	Transport
Layer 4	end-to-end connection reliability
Layer 4	ensures integrity of data
Layer 4	concerned with data transport issues between hosts
Layer 4	data transport reliability
Layer 4	establish, maintain, terminate virtual circuits
Layer 4	fault detection and recovery
Layer 4	information flow control
Layer 4	TCP: Transmission Control Protocol
Layer 3	Network
Layer 3	Addresses & best path
Layer 3	provides connectivity and path selection between two end systems
Layer 3	domain of routing
Layer 3	IP: Internet Protocol
Layer 3	Logical Addresses
Layer 2	Data Link
Layer 2	Access to media
Layer 2	provides reliable transfer of data across media
Layer 2	physical address, network topology, error notification, flow control
Layer 2	physical address: MAC address (Media Access Control)
Layers 2 & 3	only layers concerned with addressing
Layer 2	Protocol: Ethernet
Layer 2	Protocol: Frame Relay
Layer 1	Physical
Layer 1	binary transmission
Layer 1	wires, connectors, voltages, data rates

Created by: lynzl84 on 2006-08-31