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Computer Science

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Computer science Computer science is the  scientific  and practical approach to  computation  and its applications. It is the systematic study of the feasibility, structure, expression, and mechanization of the methodical  procedures  (or  algorithms ) that underlie the acquisition, representation, processing, storage, communication of, and access to  information , whether such information is encoded as  bits  in a  computer memory  or transcribed in  genes  and  protein  structures in a biological  cell . [1]  A  computer scientist  specializes in the theory of computation and the design of computational systems. [2] Its subfields can be divided into a variety of theoretical and practical disciplines. Some fields, such as  computational complexity theory  (which explores the fundamental properties of  computational  and intractable problems), are hig...
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Facebook

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Facebook, Inc.  is an American online  social media  and  social networking service  company based in  Menlo Park, California . Its website was launched on February 4, 2004, by  Mark Zuckerberg , along with fellow  Harvard College  students and roommates  Eduardo Saverin ,  Andrew McCollum ,  Dustin Moskovitz  and  Chris Hughes . The founders initially limited the website's membership to Harvard students. Later they expanded it to  higher education institutions in the Boston area , the  Ivy League  schools, and  Stanford University . Facebook gradually added support for students at various other universities, and eventually to high school students. Since 2006, anyone who claims to be at least 13 years old has been allowed to become a registered user of Facebook, though variations exist in this requirement, depending on local laws. The name comes from the  face book  directories often ...
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Network Topology

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Network topology  is the arrangement of the various physical elements ( links , nodes , etc.) of a  computer network .  Essentially, it is the  topological [3] structure of a network and may be depicted physically or logically.  Physical topology  is the placement of the various components of a network, including device location and cable installation, while  logical topology  illustrates how data flows within a network, regardless of its physical design. Distances between nodes, physical interconnections, transmission rates, or signal types may differ between two networks, yet their topologies may be identical. An example is a  local area network  (LAN). Any given node in the LAN has one or more physical links to other devices in the network; graphically mapping these links results in a geometric shape that can be used to describe the physical topology of the network. Conversely, mapping the data flow between the components determin...
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