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Transmission Media - (1)

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Transmission Media - 1 Objectives : Cable characteristics Various types of Cables  Fiber optic cable  Connectors of fiber optic cable  Cabling Standard - EIA/TIA 568A and 568B  Straight cabling & Cross Cabling   Introduction :-       Networking involves connection of computers, workstations and peripheral devices. Networking hardware involves all the peripheral devices,interface cards and other equipment such as cables and wires that are used to establish a network connection. Wire is a single, cylindrical strand of metal conductor with low resistance to the current flow. Cable can be defined as a bunch of wires bound together which may be or insulted. You can connect these devices either using physical transmission medium or using wireless transmission medium. Physical transmission media involves the use of wires and cables. (1) Characteristics of Cables  :       Before selecting a cable for a networking, you may have to consider various cabl
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OSI Model - 1

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Open system Interconnection  (OSI) Model - 1 Open System Interconnection (OSI) Model  :-            Open System Interconnection (OSI) Model was developed by the International Standards Organization (ISO) describes the flow of information from one computer to another. OSI model is also called ISO OSI Reference Model. It is conceptual model that has seven layers. Physical, Data link, Network, Transport, Session, Presentation and Application are the seven layers of OSI model. Each layer performs distinct functions on the data in accordance with the precious layer functions. The application, presentation and session layers are called as Upper layers.  7 layers of OSI model           All the layers of the OSI reference model use different protocols. Protocol defines the procedure that is to be followed during data transmission. It is the set of specified rules and standards used to transmit data from one device to another. (1.1)  Physical layer  :-        
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Ethernet - (1)

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Ethernet - (1) Introduction   :-             Network involves connection of computers, Workstation and network devices such as routers, switches, and firewalls. These devices are interconnected with each other with the help of a medium. Ethernet is most widely used Local Area Network ( LAN ) technology and is formally defines by IEEE 802.3 standard. Ethernet makes use of different cables for communication between different computers.               The high speed Ethernet is developed to increase the connectivity speed. All these standard use different transmission rates. (1)  High Speed Ethernet  :-              High speed Ethernet was developed in order to increase the connectivity speed between the terminals or computers in a particular network. The various high speed Ethernet standards are: Fast Ethernet or 100Base Ethernet  – Defines Ethernet standards at the nominal arte of 100 Mbps, against the original Ethernet speed of 100 Mbps. Gigabit Et
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