what is the difference between 2 tier and 3 tier?
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All projects are broadly divided into two types of applications 2 tier and 3 tier architecture. Basically high level we can say that 2-tier architecture is Client server application and 3-tier architecture is Web based application.
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In plain english, the Tier refers to "each in a series of rows or levels of a structure placed one above the other" whereas the Layer refers to "a sheet, quantity, or thickness of material, typically one of several, covering a surface or body". Tier is a physical unit, where the code / process runs.
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Data centre tiers are a system used to describe specific kinds of data centre infrastructure in a consistent way. Tier 1 is the simplest infrastructure, while Tier 4 is the most complex and has the most redundant components. Each tier includes the required components of all the tiers below it.
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The difference between Layer 3 and Layer 2 networks. ... Generally speaking, Layer 2 is a broadcast Media Access Control (MAC) MAC level network, while Layer 3 is a segmented routing over internet protocol (IP) network.
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Products that are ranked at Tier 1 or higher represent the top 25% of appliances on the market relative to energy efficiency. Above Tier 1 are Tiers 2, 3, and 4. The higher the rating, the better the energy savings. Tier 3 represents a highly efficient household appliance.
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N-Tier and N-Layer are entirely different concepts. ... N-Tier refers to the actual n system components of your application. On the other hand, N-Layers refer to the internal architecture of your component. N-Tier architecture usually has atleast three separate logical parts, each located on separate physical server.
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Tier 1: The highest level of competition, also called "AAA", following the Canadian system. Tier 2: also called "AA" or "A". Tier 3: may also be called "A", the lowest level of competitive hockey. Recreational/Developmental: Includes house league and select.
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So, in short Tier 2 units require you to be in the epitome of fitness and strength, etc. Whereas Tier 1 units require the aforementioned things to a greater extent as well as prior military service which means an already developed military skill set.
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Layers describe the logical groupings of the functionality and components in an application; whereas tiers describe the physical distribution of the functionality and components on separate servers, computers, networks, or remote locations.
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So a 3 tier AC is a normal sleeper coach with AC. It has a total of 72 seats normally in a coach. 3 berths on 1 side, one above the other (Lower berth, Middle berth & Upper berth). A 2 tier AC is a AC coach with 2 berths on 1 side, one above the other (Lower berth & Upper berth).
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AC 3 Tier (3 AC) The only discomfort is that instead of being 2×2 seating it is 3×2 seating. It has three tiers of bunks – upper, middle and lower on one side and two bunks on the other side of the aisle. It's more crowded than 2 AC, and lacks the privacy curtains and individual reading lights found in 2 AC.
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Tier 1 includes BMW, Lexus, and Mercedes-Benz. Tier 2 includes Lincoln, Acura, Cadillac, and Audi. ... The Tier 1 group continues to establish its dominance, while the Tier 2 group struggles to maintain relevance.
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In three-tier, the application logic or process resides in the middle-tier, it is separated from the data and the user interface. Two-tier architecture consists of two layers : Client Tier and Database (Data Tier). Three-tier architecture consists of three layers : Client Layer, Business Layer and Data Layer.
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Second Class AC (2AC) is usually a good compromise between amenities and cost. This coach only has 4 berths in the each coupe and the coach has 48 berths in total. ... Three Tier or Third Class AC (3AC) provides the basic amenities, still more than the non AC, but at a more affordable rate.
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Tier I contains general information on hazardous chemicals at a facility, and Tier II contains specific information on hazardous chemicals present at the facility. The Tier II forms must be submitted annually on March 1st and sent to: Your State Emergency Response Commission.
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Tier 3 includes preferred brand drugs and non-preferred generic drugs. Tier 4 includes non-preferred brand drugs and non-preferred generic drugs. Tier 5 is the highest tier. It contains very high cost brand and generic drugs, which may require special handling and/or close monitoring.
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Tier 1 networks provide global network coverage. There are only a dozen Tier 1 providers in the world, although there are some Tier 2 providers that may claim to be Tier 1 ISPs. ... A Tier 2, on the other hand, is a provider that connects between Tier 1 and Tier 3 internet service providers.