TYPES OF COMPUTER NETWORKS: A computer networks is a communication system connecting two or more computers that work together to exchange information & share resources. A network may consist of microcomputers or it may integrate microcomputers or other devices with large computer. Networks can be controlled by all nodes co-ordinarily & supply all resource. These networks differ in geographical size. There are three important types of networks. 1. Local Area Network 2. Metropolitan Area
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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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COMPUTER NETWORK ADMINISTRATOR A computer network (the "network") is the connection of at least two or more computers for the purpose of sharing data and resources. These resources can include printers‚ Internet access‚ file sharing‚ and electronic mail ("e-mail"). In today ’s technological environment‚ most companies and businesses have some kind of network used on a daily basis. Thus‚ it is imperative to day-to-day operations that networks run smoothly. Companies employ at least one person
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Build a Computer Network Table of Contents Build a computer Network ……………………………………………………….. 1 What is a computer…….……………………………………………………………. 2 (b) What are the main types of computers used in a Network? … 2 What is a Network…………………………….…………………………………… 3 What hardware and software is found in a computer network……….. 4-9 Conclusion ……………………………………………………………………………. 10 Basic information on students assigned to do this project……………… 11 Build a Computer Network What
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match the cable type of the network. Most common hubs interconnect Category 3 or 5 twisted-pair cable with RJ-45 ends‚ although Coax BNC and Fiber Optic BNC hubs also exist. Ethernet Hubs An Ethernet hub is also called a multiport repeater. A repeater is a device that amplifies a signal as it passes through it‚ to counteract the effects of attenuation. Multistation Access Unit A Multistation Access Unit (MAU) is a special type of hub used for token ring networks. Switches Switches are
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COMPUTER COMMUNICATION NETWORKS Objectives • • • • • What is telecommunication History of telecommunication Role of telecommunication in Organizations Interpersonal communication applications Computer networks What is telecommunication? “Transmission of data or audible/visible information by electrical/electronic means” e.g. telephone‚ telegraph‚ radio‚ television‚ computer networks (Internet) Basic elements 1. Transmitter : takes information and converts it to a signal 2. Transmission
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A network topology that is generally in a line formation‚ which uses several devices that are all connected to a common central cable called a bus and commonly used for LAN’s. Component Description Usually 2 or more desktop of notebook computers with a network interface card. A common printer is shared by all desktops or notebook computers. The server process requests and delivers data to the client computers over the internet or network.
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Table of Contents Introduction Below is the report is a report outlining the steps that were undertaken in order to come up with a computer network design that will benefit the company‚ and help improve the security and safety of the company’s information while also improving communication among the four offices. Task 1 To improve my work I could use some images depicting each and every device. Available media…. Wired Media Cable type Types Connectors Unshielded twisted pair Category
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1. Frequency Division Multiplexing Frequency Division Multiplexing is a technique that can be applied when bandwidth of the link is greater than combined bandwidth of signals to be transmitted. Frequency Division Multiplexing technique is the process of translating the frequency of individual channel into per-assigned 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
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Pamphlet of Computer System Architecture (LO3) KEY SYSTEM COMPONENTS: Von Neumann architecture- Model for designing and building computers‚ based on the following three characteristics: * The computer’s four main sub-systems: * Memory * ALU (Arithmetic/Logic Unit) * Control Unit * Input/output System (I/O) * Program is stored in memory during execution. * Program instructions are executed sequentially. VON NEUMANN ARCHITECTURE MEMORY SUBSYSTEM: *
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