Assignment in Computer Science 1 1. IMAP (Internet Message Access Protocol) -is an application layer that allows an e-mail client to access e-mail on a remote mail server. It supports both on-line & off-line modes of operation. The current version‚ IMAP version 4 revision 1 (IMAP4rev1)‚ is defined by RFC 3501. 2. POP (Post Office Protocol) -is an application layer Internet standard protocol used by local e-mail clients to retrieve e-mail clients to retrieve e-mail from a remote
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| | | No more than one bad frame per 105 bytes of data. | ____________________ depicts routers‚ logical links between routers‚ and high-level routing protocol configuration information. Answer | | The Layer 2 STP domain | | | A data link layer device map | | | The Layer 3 topology of an internetwork | | | A logical map | Most systems follow a cyclical set of phases: Answer | | start-up‚ iterations‚ feedback‚ final release. | | | initiation‚ assessment‚ completion
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XYZ NETWORK DESIGN XYZ Network Design Franklin Joel Grimes IT 230 Executive Summary This paper will help to clearly define the network design of XYZ Corporation by ABC Computing. Together we will meet your IT challenges in a seamless‚ highly organized fashion. What we must address together‚ are the following: ⎫ What are the goals of the network design project ⎫ What things may be assumed ⎫ The pros and cons of our proposed IT solutions ⎫ The exact
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4. Ibuprofen (C13hH18O2) Introduction In this experiment‚ several analgesics were analyzed by Thin Layer Chromatography (TLC) and the composition of an unknown tablet was identified. We define chromatography as the separation of two or more compounds or ions by their molecular interactions by either a moving or a stationary phase.1 There are different types of chromatography: Thin Layer Chromatography (TLC)‚ Gas Liquid Chromatography (GC)‚ and Column Chromatography (CC). All of which there
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pigments were extracted by using column chromography and alumina was used as the solvent. Solvents of different polarities were used‚ starting with the least polar‚ to extract the certain components from the leaves. They were then analyzed by using thin- layer chromatography. Procedure: The first part of the experiment dealt with breaking down the spinach leaves in a mortar and pestle. Acetone was added to this to help with the breakdown of the spinach leaves. Once the spinach leaves were broke down
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could take part in reacting with the substance that it is placed in. 7. Why should latex gloves be worn when preparing chromatography plates? Latex gloves should be worn to prevent contamination of the chromatogram 8. The sample fine thin-layer chromatography plate‚ shown below‚ was prepared by spotting methyl red at R‚ sudan III at S‚ and bromocresol green at G. A single drop of each was placed on M. The plate was put in the developing solution until the solvent front reached 10 cm. Estimate
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Marks QUESTION 1 a) State FOUR (4) principles underpinning the Open Systems Interconnection (OSI) Reference Model. b) Describe the purpose of the physical layer of the OSI Reference Model. c) State THREE (3) elements of network design that relate to the physical layer of the OSI Reference Model. d) Describe the purpose of the data link layer. 4 1 3 2 Total 10 Marks QUESTION 2 a) b) c) d) Define the term a packet as used in computer networks. Briefly describe the THREE (3) key components
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Experiment 10 Thin Layer Chromatography Purpose! To identify how many components are in a mixture and the identity of a compound in a mixture by comparing the Rf of a known compound with the Rf of an unknown compound. Intodection. In this experiment the thin-layer chromatography the (TLC) will be used to determine the composition of various over-the-counter analgesic. We will be given two commercially prepared TLC plates with a flexible backing and a silica-gel coating with a fluorescent
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June 19‚ 2011 Fernando Casafranca Here are the short answer responses for the following terms: • Synchronous and asynchronous 1 SYNCHRONOUS Synchronous systems negotiate the communication parameters at the data link layer before communication begins. Basic synchronous systems will synchronize both clocks before transmission begins‚ and reset their numeric counters for errors etc. More advanced systems may negotiate things like error correction and compression. 2
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Query Parsing At the Application Layer to Prevent Sql Injection Presented by Saurabh Jain --------------------------------------------------------------------------------------------------------------------- Abstract SQL injection is a code injection technique that exploits a security vulnerability occurring in the database layer of an application. Thus when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is not strongly
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