Define Function of OSI Layers, Basic Computer Science

OSI Layers: Open Systems Interconnection model is a reference model developed by International Organization for Standardization in 1984, as a conceptual structure of principles for communication in the network across different applications by different vendors
Layer 7:Application Layer
Application layer interface to user processes for communication and data transfer in network. Provides consistent services such as virtual terminal, file and job transfer and operations
Layer 6:Presentation Layer
Masks the differences of data formats between different systems Specifies architecture-independent data transfer format Encodes and decodes data; Encrypts and decrypts data; Compresses and decompresses data
Layer 5:Session Layer
Important function of session layer are :
Dialog controller - Session layer is the dialog controller. it establishes, maintain and synchronizes between communicating system, token management- its also provide token management services
Layer 4:Transport Layer
Manages end-to-end message delivery in network Provides reliable and sequential packet delivery through error recovery and flow control mechanisms Provides connectionless oriented packet delivery
Layer 3:Network Layer
Determines how data are transferred between network devices Routes packets according to unique network device addresses Provides flow and congestion control to prevent network resource depletion
Layer 2:Data Link Layer
data link layer transforms the physical layer, row transmission facilities to a reliable link and its is responsible for node to node deliver also operating the communication links Frames packets Detects and corrects packets transmit errors
Layer 1:Physical Layer
Defines physical means of sending data over network devices. physical layer perform the functions required to transmit a bit stream over a physical medium
Posted Date: 4/22/2012 6:59:53 AM | Location : United States







Related Discussions:- Define Function of OSI Layers, Assignment Help, Ask Question on Define Function of OSI Layers, Get Answer, Expert's Help, Define Function of OSI Layers Discussions

Write discussion on Define Function of OSI Layers
Your posts are moderated
Related Questions
I NEED FLOW CHART ANT DRAWINGS OF BASIC OPERATIONS OF COMPUTER

As there are many variations in architecture between the different kinds of CPU, we shall begin my looking at an easy model of the structure. The basic model consists of five part

Hill Climbing - artificial intelligence: As we've seen, in some particular problems, searching the search path from primly to goal state is the point of the exercise. In anothe

#questioPurpose of this assignment: 1. Using dictionaries. Assignment: Write a program to read a text file and create a dictionary. The keys for the dictionary should be all

Digital Transmission: In digital transmission, wave patterns are translated into discrete bits and are separated by intervals. Bits (contraction for binary digits) are the sma

Purpose of Code This is a short program to practice assembly language loops and if/else statements. You will use various jump commands and the cmp instruction.  The progra

Opening files 0FH function is used to open an FCB file the 21H interruption. The element, the name and extension of the file must be initialized previous to opening it. The DX regi

Data communication as a need developed in the 1960s with the interconnection of peripheral devices to mainframe computers. Within the immediate vicinity of the mainframe computer t

Greedy Search-artificial intelligence: If we have a heuristic function for states, as defined above, then we may simply measure each state with respect to this measure an

"Just how are we capable to get a computer to performe intelligent tasks?" One thing to answer the question is to tell that: Logic generate a science out of many forms of re