Osi model security essay

If you changed your network infrastructure from using hubs to switches, how would the change affect the network traffic that was seen by your PC? Describe the difference between Circuit switched networks and packet switched networks. Which are more common in There were many people involved in the development of packet switching.

Osi model security essay

Reference from Google Layer 1: Physical layer It makes the relationship between a device and a transmission medium, such as a copper cable or fiber optical cable.

The physical layer is responsible for maintaining voltages and bits. The Physical Layer works with cable specifications, hubs, repeaters, network adapters, host bus adapters and more. The major functions and services performed by the physical layer are as fallows: Establishes and terminates the connection among communicating devices.

Participates in the process whereby the communication resources are effectively shared among multiple users. For example, contention resolution and flow control.

Osi model security essay

Responsible for Modulation, or conversion of data among the representation of digital data in user device and the corresponding signals transmitted over a communications channel.

Responsible for sending and receiving data in the form of bits. The Data Link Layer works between the Physical layer and network layer.

The Data Link Layer is also responsible for handling errors in a physical layer, flow control and Synchronization. The Data Link Layer works on frames. The Data Link Layer divides data into frames. The Data Link Layer provides physical addresses to data.

Network layer The Network layer works on switches and routers. The Network layer creates logical paths, known as virtual circuits.

Layers of OSI model:

The Network layer uses these logical paths or virtual circuits for transferring data from one node to another node. For this it sets the route of a packet from a source node to a destination node. Main work of Network layer are as fallows Routing.Osi Layers. The OSI model has seven layers, with each having different types of security responsibilities.

The seven layers are application, presentation, session, transport, network, datalink and physical with control being passed down from layer to /5(1). Much time was spent in creating their model called "The ISO OSI Seven Layer Model for Networking".

In this model, they have 7 layers, and each layer has a special and specific function. In this model, they have 7 layers, and each layer has a special and specific function. about examining the security needed to protect each of the first four layers.

The first layer of the OSI Model is the physical layer. The physical layer defines the Mechanical, Electrical, Procedural and Functional specifications for activating, maintaining and deactivating the physical link between communication network systems.

Below is an essay on "Osi Model" from Anti Essays, your source for research papers, essays, and term paper examples. When you connect two or more computers so they can communicate with each other, you create a data network.

The Physical layer's connectors (RJ, BNC e.c.t) and different physical topologies (Bus, Star, Hybrid networks) are defined by the OSI as standards, allowing different systems to communicate.

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We talk more about the Physical topologies in the Topologies section. The OSI model, however, is a proven concept that is used in all other data communications protocols.

It will continue to be used as a guideline for all other communications applications. References.

OSI Security Essays