CHAPTER 15 Wide-Area Wireless Networks (WANs) — GSM Evolution 15.1 Introduction Third-generation (3G) wireless systems [2‚3‚9] offer access to services anywhere from a single terminal; the old boundaries between telephony‚ information‚ and entertainment services are disappearing. Mobility is built into many of the services currently considered as fixed‚ especially in such areas as high speed access to the Internet‚ entertainment‚ information‚ and electronic commerce (e-commerce) services. The
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Network Bandwidth Predictor (NBP): A System for Online Network performance Forecasting Alaknantha Eswaradass‚ Xian-He Sun‚ Ming Wu Department of Computer Science Illinois Institute of Technology Chicago‚ Illinois 60616‚ USA {eswaala‚ sun‚ wuming}@iit.edu Abstract The applicability of network-based computing depends on the availability of the underlying network bandwidth. However‚ network resources are shared and the available network bandwidth varies with time. There is no satisfactory solution
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I have decided to pursue the career of a network system administrator or IT professional. Over the last ten years or so computers have become fundamental parts of everyday life‚ used for a variety of reasons at home‚ in the workplace‚ and at schools. Of course every computer user runs into obstacles from time to time‚ whether it is the blue screen of death‚ the forgotten password‚ or the loss of important data. The explosive use of computers has created a high demand for specialists to provide advice
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There is nothing more important in any business than securing your network topology from hardware‚ design and software. This plan is called network hardening and this plan needs to be incredibly detailed with how the network will be secured in each area. The first step to the network hardening plan resides in how you will build the network and then from there how you will secure each section of the network. This paper will discuss access control measures‚ encryption‚ PKI‚ certificates‚ OS hardening
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Network Neutrality “We are all now connected by the Internet‚ like neurons in a giant brain.” –Stephen Hawking. This quote by Stephen Hawking is true now but some claim the internet may be in danger. A new policy the United States is trying to adopt is this set of standards called “Net Neutrality”. These standards would push internet providers to keep the internet neutral‚ and not allow companies to pay providers to speed up their connection and make it a priority over others. People have recently
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several servers – (No broadcast) provides flexibility where we don’t care about which route the data goes through Route Optimization: necessary to improve the internet performance by Reduce latency Bandwidth utilization Reduce vulnerability to network partition Eliminate any potential home agent bottleneck Transition methods Because not all routers can be upgraded simultaneously Duel Stack: translate between format‚ utilize a duel stack router Tunneling: IPv6 carried as payload in IPv4 datagram
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TYPES OF COMPUTER NETWORKS Maninder Kaur professormaninder@gmail.com What is Network? • A network consists of two or more computers that are linked in order to share resources (such as printers and CDs)‚ exchange files‚ or allow electronic communications. • The computers on a network may be linked through cables‚ telephone lines‚ radio waves‚ satellites‚ or infrared light beams. Different Types of Networks • Depending upon the geographical area covered by a network‚ it is classified as: – Local
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INTRODUCTION In today’s modern world computer networks are the basic source of information exchange for all types of businesses. Different technologies are used within the context of networking depending on the requirements of an organization. Ethernet is off course the best technology for the “local area network” (LAN)‚ but when the organization spread their business to much longer distances (cities) then WAN technologies need to be deployed to keep the business running. The selection of an appropriate
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1 Multi-Channel Scheduling and Spanning Trees: Throughput-Delay Trade-off for Fast Data Collection in Sensor Networks ¨ Amitabha Ghosh‚ Ozlem Durmaz Incel‚ V. S. Anil Kumar‚ and Bhaskar Krishnamachari Two primary factors that affect the data collection rate (throughput) and timeliness (delay) are: (i) efficiency of the link scheduling protocol‚ and (ii) structure of the routing tree in terms of its node degrees and radius. In this paper‚ we utilize multiple frequency channels and design an
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OCR LEVEL 3 CAMBRIDGE TECHNICAL CERTIFICATE/DIPLOMA IN IT COMPUTER NETWORKS R/601/7320 LEVEL 3 UNIT 7 GUIDED LEARNING HOURS: 60 UNIT CREDIT VALUE: 10 COMPUTER NETWORKS R/601/7320 LEVEL 3 UNIT 7 AIM OF THE UNIT This unit aims to give the learners an understanding of the key components‚ the network protocols and the services provided by network systems. Learners will develop skills required to ensure network security‚ gain an understanding to the functions of hardware and software
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