Shared Flashcard Set

Details

OSI model
flash cards
8
Computer Science
Undergraduate 1
10/29/2008

Additional Computer Science Flashcards

 


 

Cards

Term

APPLICATION LAYER

Definition

LAYER 7 THIS LAYER INTERFACES DIRECTLY TO THE APPLICATION AND PERFORMS COMMON APPLICATION SERVICES FOR THE APPLICATION PROCESSES.

 

NO PROTOCOLS

Term

 

 

PRESENTATION LAYER

Definition

LAYER 6

THE PRESENTATION LAYER RELIEVES THE APPLICATION LAYER OF CONCERN REGARDING SYNTACTICAL DIFFERENCES IN DATA REPRESENTATION WITHIN THE END-USER SYSTEM.

 

PROTOCOLS: POP,SMPT,DNS,FTP,Telnet,ARP

Term

 

 

 

SESSION LAYER

Definition

 

LAYER 5. THE SESSION LAYER PROVIDES THE MECHANISM FOR MANAGING THE DIALOGUE BETWEEN END-USER APPLICATION PROCESSES. THE SESSION LAYER HOLDS THE CHANNEL OPEN.

PROTOCOL: NetBIOS

Term

TRANSPORT LAYER

Definition

LAYER 4. THIS LAYER PROVIDES END-TO-END COMMUNICATION CONTROL. IT IS A VIRTUAL CIRCUIT.

PROTOCOL: TCP

Term

 

 

NETWORK LAYER

Definition

 

 

LAYER 3. THIS LAYER ROUTES THE INFORMATION IN THE NETWORK.

PROTOCOL: IP, ICMP

Term

DATA LINK LAYER

Definition

LAYER 2.  THIS LAYER DESCRIBES THE LOGICAL ORGANIZATION OF DATA BITS TRANSMITTED ON A PARTICULAR MEDIUM. DATA LINK IS DIVIDED INTO TWO SUBLAYERS: THE MEDIA ACCESS CONTROL LAYER(MAC) AND THE LOGICAL LINK CONTROL LAYER(LLC).

PROTOCOLS: SLIP, PPP

Term

 

 

PHYSICAL LAYER

Definition

LAYER 1.  THIS LAYER DESCRIBES THE PHYSICAL PROPERTIES OF THE VARIOUS COMMUNICATIONS MEDIA, AS WELL AS THE ELECTRICAL PROPERTIES AND INTERPRETATION OF THE EXCHANGED SIGNALS. THE PHYSICAL LAYER IS THE ACTUAL NIC, ETHERNET CABLE, AND SO FORTH.

PROTOCOLS: NONE

Term

OSI MODEL

Definition

 

THE OPEN SYSTEMS INTERCONNECT MODEL.

THIS MODEL IS A DESCRIPTION OF HOW THE NETWORKS COMMUNICATE. IT DESCRIBES THE VARIOUS PROTOCOLS AND ACTIVITIES, AND DELINEATES HOW THE PROTOCOLS AND ACTIVITIES RELATES TO EACH OTHER.

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