What is Networking? (Tutorial -1)

A *networking* can be anything from a collection of computers at one location that have been tied together using a particular connectivity medium(such as copper wires) to a global network, such as internet, that uses a number of different connectivity media, including satellite technology. The network is used to transmit data, voice, even video among many users on network.networks consist of the computers, wiring, and other devices, such as hubs, switches, and routers that make up the network infrastructure. Some devices such as network interface cards,serve as the computer's connection to the network.
Devices such as switches and routers provide traffic control for

the network. All sorts of different technologies can actually be employed to move data from one place to another place, including wires, radio waves, and even microwave technology.

Networking means a group of computer which can share resources. Networks can be small as two or more than two computers connected in a peer-to-peer arrangement or as large as global networks such as the internet that uses a number of different types of network such as LAN, MAN, WAN connectivity strategies, including satellite technologies.

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Network Topologies (Tutorial-4)

Topology refers to the way in which the network of computers is connected. The choice of topology is dependent upon--- Type and number of equipment being used Planned applications and rate of data transfers Required response times Cost Types of Network Topologies Physical Topology: Physical topology defines how devices are connected to the network through the actual cables that transmit data(physical structure of the network) Logical Topology: Logical Topology (also referred to as Signal Topology) is a network computing term used to describe the arrangement of devices on a network and how they communicate with one another.

Cisco Hierarchical Model

Cisco Hierarchical Model Defined by Cisco to simplify the design, implementation, and maintenance of responsive, scalable, reliable, and cost-effective networks. The 3 layers are logical and not physical – there may be many devices in a single layer, or a single device may perform the functions of 2 layers, eg: core and distribution. The Cisco Hierarchical Model

OSI Model (Tutorial-6)

What is the OSI model ? Open Systems Interconnection model is fundamental to all communications between network devices. Developed in 1974 by ISO after the American Department of Defence began using the TCP/IP suite of protocols. Finally adopted in 1977. It is now the theoretical model for how communication takes place between network devices. What are the seven layers ? Layers OSI Model Layer 7 Layer 6 Layer 5 Layer 4 Layer 3 Layer 2 Layer 1

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