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
We normally think of the arts as very different from technologies in spite of the fact that art (with perhaps a few exceptions) is practiced with the help of technology. This pract

• Multilevel feedback queue-scheduling algorithm enables a process to move among queues. It uses a number of ready queues and acquaintances a dissimilar priority with every queue.

(iv) Suppose that the TCP entity receives a 1.5 megabyte file from the application layer and that the IP layer is willing to carry blocks of maximum size 1500 bytes. Calculate the

Question 1 Explain the role of object oriented designers in developing a software system Question 2 What are the four essential elements of design patterns? Explain Question 3

Long term goal of artificial intelligence: This is not to be complex with the applications of AI programs to other sciences, discussed later. Rather, it is just pointing out th

Question 1 Write short notes on                           (a) Office Automatics System                           (b) Transaction Processing System Question 2 What is a too

Question 1 Write a long note on the security features of Windows XP Question 2 Write a long note on computer peripherals, briefly describing some of the devices Question

You can also allocate a single value to several variables at the same time. For instance: X=y=z =1 Now, an integer object is generated with the value 1, and all three variables are

Variables and Constants: These are the smallest components of a programming language.  For writing a program, one must know how to use the internal memory of a computer. A Com

#quesetion..explain the concept of data transmission giving details of the transmission rate and bandwidth with details explanation of the transmission media