COMPUTER NETWORKS 4TH MARCH 2012 Examination Paper Answer ALL questions. Clearly cross out surplus answers. Time: 2 hours Any reference material brought into the examination room must be handed to the invigilator before the start of the examination. ANSWER ALL QUESTIONS 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
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Deric Law CGS00479903 1. Improving Network Topology Draw the topology of the network that you are currently using. Be sure to include addressing structures‚ network architecture‚ and include devices such as core switches‚ workgroup switches‚ firewalls‚ routers‚ and other network devices. Analyze the security of the topology and then draw a proposed new topology. Be sure to include security detection systems as well as security zones. Kazakhstan International School had implemented their network infrastructure since
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LANs: Local Area Networks Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also
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APPROVAL SHEET This thesis here entitled “Why do College Students post their personal information on the Social Network?” Prepared and submitted by Midn. Mark Dennis C. Palapag in partial fulfillment of the requirements for the course English 4 (business correspondent and technical). It has been examined and recommended for acceptance and approval for this subject course. Mrs. Eden Arenas Professor ____________________________ Date Signed: -------------------------------------------------
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is “networking”? Networking is anything that involves meeting‚ communicating and connecting with others‚ so that you may share knowledge‚ skills and practices for the benefit of everyone concerned. Networking could be attending a specific Networking event such as BNI‚ connecting with people in your same industry or area of interest‚ meeting people‚ having coffee with new people‚ attending conferences and seminars in your area of interest‚ speaking at an event‚ attending trainings‚ etc.
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Kirchhoff’s Law Kirchhoff’s current law (KCL) imposes constraints on the currents in the branches that are attached to each node of a circuit. In simplest terms‚ KCL states that the sum of the currents that are entering a given node must equal the sum of the currents that are leaving the node. Thus‚ the set of currents in branches attached to a given node can be partitioned into two groups whose orientation is away from (into) the node. The two groups must contain the same net current. In general
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Social Issues with social networks Ironically social sites lead us to self-justification and appraising personalities which are anti-social. Share concepts but not sell yourself. Eloquence‚ digital self-image building distorts our own surrealistic ideology and thoughts. Our social site panopticon needs to be disrupted and shattered. Social Networks lacks personal touch‚ share NO real feelings‚ boring and repetitive content‚ making people feel bad in uneven societies‚ most of all it creates a virtual
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Wireless network refers to any type of computer network that uses wireless (usually‚ but not always radio waves) for network connections. It is a method by which homes‚ telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building‚ or as a connection between various equipment locations.[1] Wireless telecommunications networks are generally implemented and administered using radio communication. This implementation takes place
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frequency slots within the bandwidth of the transmission medium. Different carries frequencies are assigned to different users. We can use any modulation scheme to assign carrier frequency. Example: FDM can also be used to combine signals before final modulation onto a carrier wave. In this case the carrier signals are referred to as subcarriers: an example is stereo FM transmission‚ where a 38 kHz subcarrier is used to separate the left-right difference signal from the central left-right sum channel
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Network monitoring tools can have many important functions that can increase the scaleability and usefulness of a network. They ensure that the computers and devices on the network are functioning at the highest level possible‚ and are available. They also can help increase the productivity and ease of an IT department’s job‚ so it’s important that they choose the right product that suits their needs the best. Network monitoring software detects and reports failures of connections and devices.
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