Computer Networking A Basic Approach!

By:Sayak Ray (231136)Stuti Shree (231159)Swati Jhangiani (231163)Dattatreya Singla (231177)

INTRODUCTIONA computer network is a collection of

hardware components interconnected by communication channels.

consists of end user devices and network devices.layered approach to communicate OSI reference modelAll the processes divided into logical groupings

called layers. layered architecture.

OSI MODELThe OSI(Open Systems Interconnection) model is a

product of the Open Systems Interconnection effort at the International Organization for Standardization(ISO).

conceptual modelIt uses a seven layer architecture.Internal functions of a communication systemPartitioning into abstraction layers.Framework for creating and implementing networking

standards, devices, and internetworking schemes.Used to create and implement applications that run on

a network.

Application LayerThe application layer is responsible for providing services to the user

Presentation LayerThe presentation layer is responsible for translation, compression, and encryption

Session Layer The session layer is responsible for dialog control and synchronization.

It coordinates the functions required to transmit a bit stream over a physical medium. The network layer is responsible for the delivery of individual packets from the source host to the destination host.

The transport layer is responsible for the delivery of a message from one process to another.

Network Layer

Transport Layer

Data Link LayerThe data link layer is responsible for moving frames from one hop (node) to the next.

Physical Layermanages the reception and transmission of the unstructured raw bit stream over a physical medium.

Summary of Layers :

LAN, WAN, MAN

Windows Network Architecture and the OSI Model

Microsoft Windows network drivers implement the bottom four layers of the OSI Reference Model

Physical Layer in WindowsImplemented by the network interface card

(NIC), its transceiver, and the medium to which the NIC is attached.

A network interface card (NIC) is a computer circuit board or card that is installed in a computer so that it can be connected to a network.

Other layers in WindowsMAC is implemented in the NIC.

The LLC, network, and transport layers are implemented by software drivers known as protocol drivers, which are sometimes referred to as transport drivers.

Protocol drivers : interface between a redirector and a network.

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