...Case: You are appointed as a technical expert to implement a network system for a small size maritime supplyrepresentative company with four users. The company provides supply services to Maritime shipping companies through a worldwide network of suppliers. Its owner is a maritime business expert who doesnot know much about the use of computer systems to support her business. Therefore, she has decidedto employ you as a consultant on a short term basis to set-up appropriate systems in a network. She hasheard about various technologies and the efficiency achieved by computer systems and would welcomeadvice on the acquisition of hardware, software and network items to augment her existing systems inorder to meet the company’s growing needs. The company has a budget of £100,000 for this project. The company currently consists of the following departments (all located in the same open space office): The sales Manager who is responsible for dealing with Maritime companies. She is assisted by asales assistant, equipped with a laptop but with no ability to access the web. This department iscurrently the only one with a connection to the Internet and with access to the company’s commonemail. The General Manager who is responsible for the general operation of the company. She tradeswith suppliers all over the world in order to ensure the best prices of goods for the company’sMaritime shipping clients. For client communication, she uses plain telephone services and a faxmachine....
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... * How much growth is this network going to have to support? When planning for this, you want to make sure that the company is going to have room to grow, which may vary depending on the company. For example, Target is probably going to be a faster growing network than a local mom/pop shop. * Availability * How long your network is available to users. Basically: is your network and up and running all day, every day? * Network Performance * This includes categories that measure the throughput of data and how efficient your network actually is. (Optimum Utilization) * Security * Security design is one of the most important aspects of a network. Without proper security your network is vulnerable to online cyber attacks that can cripple and steal from your databases. * Manageability * This technical goal is going to vary based on company needs. Some customers are going to have more precise goals. The book talks about a company planning to record the number of bytes sent and received to each router. Other clients may have less specific goals than this, it just tends to vary based on company objectives. * Usability * Close to manageability, but different. Usability refers to people who are accessing and using the network you have setup. Your network needs to be easy to use for them (different from management. Easier To Use =/= Easier To Manage) * Adaptability * Design the network so that in can accept new technologies...
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...IT140-1302A-05: Introduction to Operating Systems and Client/Server Environments Group Assignment Carroll Backus, Sonia Crumbley, Willie Coffie, Jason Duggan, Christopher West 13 May 2013 Instructor: Dr. Betty Tipton Colorado Technical University Table of Contents Technology Analysis and Assessment Plan 3 Technology Analysis and Assessment Improvement Plan 6 Operating System Platform and Cost Containment 6 Architecture Assessment and Governance 9 Enterprise Authentication 11 Directory Services and Domain Consolidation 13 System Administration 15 Operating Systems 17 Email System 19 Maintenance 21 Network Security 23 Summary 25 References 26 Technology Analysis and Assessment Plan Listed below is a simple diagram of the hardware layout in Acme Gym Inc., a small local fitness company that serves the community from a single location. Following the diagram is a detailed description of the current technology available on-site and an assessment of its weaknesses. There are currently four workstation computers located across several office locations. All four workstations currently contain essentially the same hardware and software consisting of: * Microsoft Windows XP operating system * 2 GHz CPU * 2 GB RAM * 120 GB Hard drive * DVD burner drive * Built-in USB and Ethernet ports The server on-site is currently running Microsoft Windows Server 2000 operating system. It contains the following hardware: * 2 each removable 250...
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...Networks, Telecommunications, and Wireless Computing | | | Telecommunication systems enable the transmission of data over public or private networks. A network is a communications, data exchange, and resource-sharing system created by linking two or more computers and establishing standards, or protocols, so that they can work together. Telecommunication systems and networks are traditionally complicated and historically ineffi cient. However, businesses can benefi t from today’s modern network infrastructures that provide reliable global reach to employees and customers. Businesses around the world are moving to network infrastructure solutions that allow greater choice in how they go to market—solutions with global reach. These alternatives include wireless, voice-over internet protocol (VoIP), and radio-frequency identification (RFID). | | | | | Knowledge Areas | Business Dilemma | | | Business Dilemma Personal sensing devices are becoming more commonplace in everyday life. Unfortunately, radio transmissions from these devices can create unexpected privacy concerns if not carefully designed. We demonstrate these issues with a widely-available commercial product, the Nike+iPod Sport Kit, which contains a sensor that users put in one of their shoes and a receiver that users attach to their iPod Nanos. Students and researchers from the University of Washington found out that the transmitter in a sneaker can be read up to 60 feet away. Through the use of a prototype...
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...Microsoft account Joseph Jackson Westwood College Designing a Network Microsoft account Joseph Jackson Westwood College Designing a Network Determining the networking requirements the designing of a network can be a difficult situation. Whether its data transfer rules that determine the number of channels needed and the priorities to be used. An alternate real issue is the most extreme size of data that can be sent and received leads to the need for segmentation at the sending end and reassembly at the receiving end. Networking design must reflect the objectives, attributes, and approaches of the associations in which they work. A decently planned network can help adjust these targets. At the point when legitimately executed, the network base can improve application accessibility and permit the savvy utilization of existing network assets. The primary step is to comprehend your networking necessities. (Cisco Systems, Inc.) There are two essential objectives when setting up a networking design and having the capacity to execute the design into a live environment. The principal objective is to have application accessibility. The system conveys application information between machines. On the off chance that the applications are not accessible to system clients, the system is not doing its occupying. Which can make trouble managing getting to applications over the system. The second of the essential objectives is the Cost of possession. The Information system (IS) plans...
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...Home » Resources » Networking Tutorials » Network Switching Tutorial Network Switching Tutorial Network Switching Switches can be a valuable asset to networking. Overall, they can increase the capacity and speed of your network. However, switching should not be seen as a cure-all for network issues. Before incorporating network switching, you must first ask yourself two important questions: First, how can you tell if your network will benefit from switching? Second, how do you add switches to your network design to provide the most benefit? This tutorial is written to answer these questions. Along the way, we’ll describe how switches work, and how they can both harm and benefit your networking strategy. We’ll also discuss different network types, so you can profile your network and gauge the potential benefit of network switching for your environment. What is a Switch? Switches occupy the same place in the network as hubs. Unlike hubs, switches examine each packet and process it accordingly rather than simply repeating the signal to all ports. Switches map the Ethernet addresses of the nodes residing on each network segment and then allow only the necessary traffic to pass through the switch. When a packet is received by the switch, the switch examines the destination and source hardware addresses and compares them to a table of network segments and addresses. If the segments are the same, the packet is dropped or “filtered”; if the segments are different...
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...Chapter 1 Analyzing Business Goals and Constraints This chapter serves as an introduction to the rest of the book by describing top-down network design. The first section explains how to use a systematic, top-down process when designing computer networks for your customers. Depending on your job, your customers might consist of other departments within your company, those to whom you are trying to sell products, or clients of your consulting business. After describing the methodology, this chapter focuses on the first step in top-down network design: analyzing your customer’s business goals. Business goals include the capability to run network applications to meet corporate business objectives, and the need to work within business constraints, such as budgets, limited networking personnel, and tight timeframes. This chapter also covers an important business constraint that some people call the eighth layer of the Open System Interconnection (OSI) reference model: workplace politics. To ensure the success of your network design project, you should gain an understanding of any corporate politics and policies at your customer’s site that could affect your project. The chapter concludes with a checklist to help you determine if you have addressed the business issues in a network design project. Using a Top-Down Network Design Methodology According to Albert Einstein: 000200010270745975 “The world we’ve made as a result of the level of thinking we have done...
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...Computer network From Wikipedia, the free encyclopedia "Computer networks" redirects here. For the periodical, see Computer Networks (journal). "Datacom" redirects here. For other uses, see Datacom (disambiguation). Network science Theory · History Graph · Complex network · Contagion Small-world · Scale-free · Community structure · Percolation · Evolution · Controllability · Topology · Graph drawing · Social capital · Link analysis · Optimization Reciprocity · Closure · Homophily Transitivity · Preferential attachment Balance · Network effect · Influence Types of Networks Information · Telecommunication Social · Biological · Neural · Semantic Random · Dependency · Flow Graphs Vertex · Edge · Component Directed · Multigraph · Bipartite Weighted · Hypergraph · Random Cycle · Loop · Path Neighborhood · Clique · Complete · Cut Data structure · Adjacency list & matrix Incidence list & matrix Metrics and Algorithms Centrality · Degree · Betweenness Closeness · PageRank · Motif Clustering · Degree distribution · Assortativity · Distance · Modularity Models Random · Erdős–Rényi Barabási–Albert · Watts–Strogatz ERGM · Epidemic · Hierarchical Browse Topics · Software · Network scientists Graph theory · Network theory v t e A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources...
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...The Wealth of Networks The Wealth of Networks How Social Production Transforms Markets and Freedom Yochai Benkler Yale University Press New Haven and London Copyright _ 2006 by Yochai Benkler. All rights reserved. Subject to the exception immediately following, this book may not be reproduced, in whole or in part, including illustrations, in any form (beyond that copying permitted by Sections 107 and 108 of the U.S. Copyright Law and except by reviewers for the public press), without written permission from the publishers. The author has made an online version of the book available under a Creative Commons Noncommercial Sharealike license; it can be accessed through the author’s website at http://www.benkler.org. Printed in the United States of America. Library of Congress Cataloging-in-Publication Data Benkler, Yochai. The wealth of networks : how social production transforms markets and freedom / Yochai Benkler. p. cm. Includes bibliographical references and index. ISBN-13: 978-0-300-11056-2 (alk. paper) ISBN-10: 0-300-11056-1 (alk. paper) 1. Information society. 2. Information networks. 3. Computer networks—Social aspects. 4. Computer networks—Economic aspects. I. Title. HM851.B457 2006 303.48'33—dc22 2005028316 A catalogue record for this book is available from the British Library. The paper in this book meets the guidelines for permanence and durability of the Committee on Production Guidelines for Book Longevity of the Council on Library Resources. 10 9 8 7 6 5 4 3 2 1...
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...2.1.1 Network History The history of computer networking is complex. It has involved many people from all over the world over the past 35 years. Presented here is a simplified view of how the Internet evolved. The processes of invention and commercialization are far more complicated, but it is helpful to look at the fundamental development. In the 1940s computers were large electromechanical devices that were prone to failure. In 1947 the invention of a semiconductor transistor opened up many possibilities for making smaller, more reliable computers. In the 1950s mainframe computers, which were run by punched card programs, began to be used by large institutions. In the late 1950s the integrated circuit that combined several, then many, and now millions, of transistors on one small piece of semiconductor was invented. Through the 1960s mainframes with terminals were commonplace, and integrated circuits were widely used. In the late 1960s and 1970s, smaller computers, called minicomputers came into existence. However, these minicomputers were still very large by modern standards. In 1977 the Apple Computer Company introduced the microcomputer, also known as the personal computer. In 1981 IBM introduced its first personal computer. The user-friendly Mac, the open-architecture IBM PC, and the further micro-miniaturization of integrated circuits led to widespread use of personal computers in homes and businesses. In the mid-1980s users with stand-alone computers...
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...Network Design Following the acquisition of new premises comprising a two-story office in Adeplhi, Maryland this provides UMUC with the ability to revise and improve their network topology accordingly and ensure that not only is connectivity provided in a consistent fashion but also to provide the required security for information accordingly. One of the fundamental requirements is to ensure that data is segregated in terms of staff and students so this will require the creation of dedicated subnets accordingly to follow through and implement the solution, while there is also a requirement to provide wireless connectivity for students in the lobby area. Given that there is a specific opportunity to develop a comprehensive infrastructure it is important that the fundamental basis in terms of cabling is of a sufficiently high quality to support current and future operational requirements. Due to the size of the building there would be limitations if using Cat 5 based Ethernet cables for example and so therefore there should be a requirement to utilize Cat 6 based Ethernet as this will support a maximum cable length in excess of 300 ft without there being any connectivity or performance issues (Mitchell, 2014). Each of the two floors will have a designated server room that is designed to provide a central point of connectivity for all locations on that floor, and each of the rooms on the first and second floor will require a certain number of data ports based on their expected utilization...
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...XelPharm owns a large distribution warehouse approximately four miles away from the headquarters. Until now, its networks have relied entirely on wired connections. The company’s CIO (chief information officer) decided long ago that he would wait until wireless technology “settled down” before investing in it. 1. What can you tell him about the wireless standards that might convince him that now is the time to adopt wireless technology? Ans: Since 1997 after IEEE released its first wireless network standard, wireless network has evolved into several distinct standards. Most attracting thing about Wireless connection is the absence of wire. Addition to that, the newer technology of wireless network can provide maximum downlink throughput to120 Mbps and maximum uplink throughput to 60 Mbps (WiMax 2). This technology is being considered to be an alternative to DSL and T-carrier services for homes and businesses. It achieves much faster throughput than T-carriers at a lower cost for end users. This type of technology can transmit and receive signals up to 50 km, or approximately 30 miles, when antennas are fixed or up to 15 km, or approximately 10 miles, when they are mobile with QoS (quality of service) provisions. 2. Also, what can you tell him to convince him that wireless networking could improve the company’s productivity? Ans: Wireless networks are a powerful tool for boosting productivity and encouraging information sharing. With...
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...would be sharing only data files and accessing servers on the network. It is more flexible and less expensive if they use wireless a network than a wire network. However, for building number 3, I would recommend to use bound transmission media because people on this building would be sharing files that contain videos. As we know sharing videos require a lot of data bandwidth; therefore, bounded transmission media is the best transmission media that we can use for the network on this building. For building number 4, I would recommend wire transmission media too. As they mention on the book, in building four, 50 shipping and packing will be riding up and down every day. This building needs a lot of bandwidth because it will be transmitting a lot of data. What type of media would you recommend using to connect the buildings and why? I would recommend using a bounded connection to connect these buildings. Even though two of these building would be using wireless networks, some of the data that will be shared by these building require a lot of bandwidth. It’s better if we use a wire network to connect these buildings. Also, the distance between building four and the other buildings might cause problems if we used a wireless network. What kind of media should the company request from its ISP for connecting the corporate WAN to the Internet? Public IP Block, this block could be in the form of /29, /28, or /27 network; depending on which plan or subnet you choose to have. Moreover...
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...Analysis and Review Questions 1. Compare the currents obtained from calculation and simulation. Comment on the findings of the values. | Calculation | Simulation using Multisim | Simulation using Pspice | Current when RL = 50 ohms | 2.994 < 69.91 A | 2.994 A | 4.273 A | Current when RL = 200 ohms | 2.306 < 47.92 A | 2.306 A | 3.277 A | Table above show the results of current obtained from the experiment and simulation. There is a different result between simulation using pspice and simulation using multisim and calculation.From calculation, the value of current used in the calculation and multisim is rms current while value of current used in pspice simulation is peak current.The value of rms current if converted to peak current have to multiply by 2 . Current when RL = 50Ω from calculation if multiply by 2 will get 4.234 A which is almost the same with Pspice simulation. Same goes when RL = 200, from calculation 2.306 x 2 = 3.261 A, which give the value almost the same with current from Pspice simulation. In calculation method, the value of current through RL is obtained using the Norton’s theorem. Each RL is calculated using the equivalent Norton’s circuit. Norton theorem is used to simplify the circuit to make the calculation easier. Below show the equivalent circuit using Norton theorem to obtain the current through RL. Norton equivalent circuit Based on the table above, the results through simulation and calculation are similar which proves...
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...Network Access Control (NAC) is a computer networking solution that uses a set of protocols to define and implement a policy that describes how to secure access to network nodes by devices when they initially attempt to access the network.[citation needed] NAC might integrate the automatic remediation process (fixing non-compliant nodes before allowing access) into the network systems, allowing the network infrastructure such as routers, switches and firewalls to work together with back office servers and end user computing equipment to ensure the information system is operating securely before interoperability is allowed. A basic form of NAC is the 802.1X standard. Network Access Control aims to do exactly what the name implies—control access to a network with policies, including pre-admission endpoint security policy checks and post-admission controls over where users and devices can go on a network and what they can do. When a computer connects to a computer network, it is not permitted to access anything unless it complies with a business defined policy; including anti-virus protection level, system update level and configuration. While the computer is being checked by a pre-installed software agent, it can only access resources that can remediate (resolve or update) any issues. Once the policy is met, the computer is able to access network resources and the Internet, within the policies defined within the NAC system. NAC is mainly used for endpoint health checks, but it...
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