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LAN Technologies (Ethernet) Notes for Computer Science & IT

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Ethernet LANs consist of network nodes and interconnecting media. The network nodes fall into two major classes: Data terminal equipment (DTE)  : Devices that are either the source or the destination of data frames. DTEs are typically devices such as PCs, workstations, file servers, or print servers that,as a group, are all often referred to as end stations. Data communication equipment (DCE)  : Intermediate network devices that receive and forward frames across the network. DCEs may be either standalone devices such as repeaters, network switches, and routers, or communications interface units such as interface cards and modems. Addressing:  LAN data transmissions classified into one of three categories: Unicast, Multicast, and Broadcast. Unicast:  Addressing is one-to-one, where one computer sends a frame to another computer. Even though many stations can receive the same data, they should ignore it since it is not addressed to them. With unicast transmi...
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Facts About Indian Currency

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Facts About Indian Currency • The first coins were minted (made) around 2500 years ago. • Paper money was first used in China over 1000 years ago. • The first "rupee” was first introduced by Sher Shah Suri. It was based on a ratio of 40 copper pieces (paisa) per rupee. • Udaya K Dharmalingam is the designer of the Indian rupee Symbol, which was adopted by the Government of India in 2010. • From 1953, Hindi was displayed prominently on the new notes. • The Government of India took over the issue of bank notes in 1861 from the Private and Presidency Banks. • The first series of coins with the Indian rupee symbol was launched on 8 July, 2011. • The first 1000 Rs Note was introduced in 2000. • Decimalization started in 1957 and the rupee was divided into 100 Naye Paise. • Total 15 Languages (Apart from English) are printed in Indian Rupee Note. They are Assamese, Bengali, Gujarati, Kannada, Kashmiri, Konkani, Malayalam, Marathi, Nepali, Oriya, Panjabi, Sanskrit, Tamil, Telugu and U...
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Chemicals & Their Common Chemical Names

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Chemicals & Their Common Chemical Names Acid Of Sugar —Oxalic Acid Ackey —Nitric Acid Alum —Aluminum Potassium Sulfate Alumina —Aluminum Oxide Antichlor —Sodium Thiosulfate Antifreeze —Ethylene Glycol Aqua Fortis —Nitric Acid Aqua Regia —Nitrohydrochloric Acid Arsenic Glass —Arsenic Trioxide Azurite —Mineral Form Of Basic Copper Carbonate Asbestos —Magnesium Silicate Aspirin —Acetylsalicylic Acid Baking Soda —Sodium Bicarbonate Benzol —Benzene Bitter Salt —Magnesium Sulfate Black Ash —Crude Form Of Sodium Carbonate Black Lead —Graphite (Carbon) Bleaching Powder —Chlorinated Lime; Calcium Hypochlorite Blue Vitriol —Copper Sulfate Bone Ash —Crude Calcium Phosphate Brine —Aqueous Sodium Chloride Solution Calomel —Mercury Chloride; Mercurous Chloride Caustic Lime —Calcium Hydroxide Caustic Soda —Sodium Hydroxide Chalk —Calcium Carbonate Diamond —Carbon Crystal Epsom Salt —Magnesium Sulfate Ethanol —Ethyl Alcohol Fluorspar —Natural Calcium Fluoride ...
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