Printer Case Study

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Question 1 There are four main types of printer: a) Laser printers The laser printer is very expensive to buy but cheap-ish to run. The output quality is very high, and it prints very fast. The function of a Laser printer is that it very rapidly produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back & forth over an electron-charged, cylindrical drum, to define a differentially-charged image. Advantages Disadvantages • Colour printing is possible • Print quality is good • Noiseless • Printing speed is high • Most models are relatively light weight and compact so they don't take up too much space on the desk • Not be the printer of choice for everyone, Due to the cost of ink, running …show more content…

Examples of internet threats are image spamming, phishing, e-mail borne viruses, e-mail spoofing, chat clients, overseas money transfer scam, Trojan Horse programs, Denial of Service Attack (DOS Attack), being an intermediary for another attack, modem hijacking, unprotected windows shares, mobile code (Java/JavaScript/ActiveX), cross-site scripting, hidden file extensions and packet sniffing. b) Internet security is a tree branch of computer security specifically related to the internet, often involving browser security but also network security on a more general level as it applies to other applications or operating systems on a whole. Its objective is to establish rules and measures to use against attacks over the Internet. Examples of internet security are network layer security, Internet Protocol Security (IPsec), security token, electronic mail security (E-mail), Pretty Good Privacy (PGP), Multipurpose Internet Mail Extensions (MIME) and message authentication code. c) Data recovery is the process of salvaging and handling the data through the data from damaged, failed, corrupted, or inaccessible secondary storage media when it cannot be accessed

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