CNT5106C Computer Networks‚ Summer 2010 Instructor: Prof. Ahmed Helmy Homework #1 On the Internet Architecture‚ Elementary Queuing Theory and Application Layer I. Internet and layered protocol architecture: Q1. (5 points) In the layered protocol architecture the transport layer functionality includes congestion control and error recovery (e.g.‚ retransmission). One suggested that this functionality should be done strictly at the end points (i.e.‚ at the hosts) without aid from the network. Do you agree
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Computer Network Specialist Abdool Samad GLC2O0-B Mr. Shin Nov. 6th ‚ 2013 The reason I have chosen a Computer Network Specialists is because I love computers of what they do and what they are capable of doing and how it has helped the humans thrive and succeed in ways other species can’t. Computer Network Specialists develop‚ install‚ and maintain the networks that connect computers to each other. Their duties are to set-up computers and install
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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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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 technology during the 70’s 80’s and 90’s Computer technology took a great leap in development during the 70’s when schools‚ businesses‚ and universities began to use computers. The 70’s would have to be the beginning of the technology of computers‚ as we know it today. The personal computer became big in the 80’s. Now computers are being updated daily‚ if not hourly. During the 70’s computers and computer use began to become known by everyone. This period was a time for development and
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frequency modulation of the composite signal. A television channel is divided into subcarrier frequencies for video‚ color‚ and audio. DSL uses different frequencies for voice and for upstream and downstream data transmission on the same conductors‚ which is also an example of frequency duplex. Where frequency-division multiplexing is used as to allow multiple users to share a physical communications channel‚ it is called frequency-division multiple access (FDMA). FDMA is the traditional way of separating radio signals
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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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secs | Points Received: | 134 / 150 (89.3%) | | Question Type: | # Of Questions: | # Correct: | Multiple Choice | 5 | 4 | Essay | 4 | N/A | | | Grade Details - All Questions | 1. | Question : | (TCO A) Cloud computing | | | Student Answer: | | is the same as e-commerce. | | | | reduces the size of IT organizations. | | | | increases business costs. | | | | requires special software‚ other than a browser‚ to be installed on each computer. | |
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Syllabus College of Information Systems & Technology IT/240 Version 4 Intro to LAN Technologies Copyright © 2012‚ 2009‚ 2007 by University of Phoenix. All rights reserved. Course Description This foundational course covers local area network topics including rationale for networking‚ the open systems interconnection (OSI) model‚ common network topologies and architecture‚ client/server concepts‚ basic hardware devices and usage‚ and basic networking security concepts. Policies Faculty
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4G Wireless Network 4G Wireless Networks: Opportunities and Challenges ABSTRACT Abstract With the major wireless service providers planning to start deployment of 4G wireless networks by mid 2010‚ research and industry communities are racing against time to find solutions for some of the prominent still open issues in 4G networks. The growing interest in 4G networks is driven by the set of new services will be made available for the first time such as accessing the Internet
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