about network essential

lvpm 2000-08-23 01:55:00

Network Diagram. Client computers on your Ethernet network are not able to access the server. You use a volt-ohmmeter to measure the resistance between the center wire and the shield on the cable, on the T-connectors, and on the terminators. You obtain the following resistance readings: RG-58 A/U coaxial cable: 0 ohms Both T-connector: ? (Infinity) ohms Both terminators: 50 ohms

What you do to repair the network?
A. Replace the 50-ohm terminators with 25-ohm terminators.
B. Replace the 50-ohm terminators with 100-ohm terminators.
C. Install replacement T-connectors.
D. Install replacement RG-58 A/U coaxial cable.

question:
Which answer is true and why it is true?

...全文

163 1 打赏收藏转发到动态举报

写回复

1 条回复

切换为时间正序

请发表友善的回复…

发表回复

lvpm 2000-08-23

打赏
举报

回复

d is true

Mike Meyers CompTIA Network Guide to Managing and Troubleshooting Networks Fifth Edition (Exam N10-007) By 作者: Mike Meyers ISBN-10 书号: 1260128504 ISBN-13 书号: 9781260128505 Edition 版本: 5 出版日期: 2018-07-10 pages 页数: 1695 Essential Skills for a Successful IT Career Written by Mike Meyers, the leading expert on CompTIA certification and training, this up-to-date, full-color text will prepare you for the CompTIA Network+ exam N10-007 and help you become an expert networking technician. Fully revised for the latest CompTIA Network+ exam, including coverage of performance-based questions, the book contains helpful on-the-job tips, end-of-chapter practice questions, and hundreds of photographs and illustrations. Mike Meyers’ CompTIA Network+ Guide to Managing and Troubleshooting Networks, Fifth Edition covers: Network architectures Cabling and topology Ethernet basics Network installation TCP/IP applications and network protocols Routing Network naming Advanced networking devices IPv6 Remote connectivity Wireless networking Virtualization and cloud computing Mobile networking Network operations Managing risk Network security Network monitoring and troubleshooting Contents Preface Introduction Instructor Web Site Chapter 1 Network Models Chapter 2 Cabling and Topology Chapter 3 Ethernet Basics Chapter 4 Modern Ethernet Chapter 5 Installing a Physical Network Chapter 6 TCP/IP Basics Chapter 7 Routing Chapter 8 TCP/IP Applications Chapter 9 Network Naming Chapter 10 Securing TCP/IP Chapter 11 Advanced Networking Devices Chapter 12 IPv6 Chapter 13 Remote Connectivity Chapter 14 Wireless Networking Chapter 15 Virtualization and Cloud Computing Chapter 16 Mobile Networking Chapter 17 Building a Real-World Network Chapter 18 Managing Risk Chapter 19 Protecting Your Network Chapter 20 Network Monitoring Chapter 21 Network Troubleshooting Appendix A Objective Map:CompTIA Network+ Appendix B Create Your Study Plan Appendix C About the Online Content Glossary Index

Review Essential reading for your IT security organization." -Deena Joyce, Director of Information Technology and Network Security, Casino Magic Product Description A new edition the most popular Hack Proofing book around! IT professionals who want to run secure networks, or build secure software, need to know about the methods of hackers. The second edition of the best seller Hack Proofing Your Network, teaches about those topics, including: Â· The Politics, Laws of Security, Classes of Attack, Methodology, Diffing, Decrypting, Brute Force, Unexpected Input, Buffer Overrun, Sniffing, Session Hijacking, Spoofing, Server Holes, Client Holes, Trojans and Viruses, Reporting Security Problems, Choosing Secure Systems The central idea of this book is that it's better for you to find the holes in your network than it is for someone else to find them, someone that would use them against you. The complete, authoritative guide to protecting your Windows 2000 Network. Updated coverage of an international bestseller and series flagship Covers more methods of attack and hacker secrets Interest in topic continues to grow - network architects, engineers and administrators continue to scramble for security books Written by the former security manager for Sybase and an expert witness in the Kevin Mitnick trials Â· A great addition to the bestselling "Hack Proofing..." series Â· Windows 2000 sales have surpassed those of Windows NT Â· Critical topic. The security of an organization's data and communications is crucial to its survival and these topics are notoriously difficult to grasp Â· Unrivalled web support at www.solutions@syngress.com

Product Description Essential Computer Security provides the vast home user and small office computer market with the information they must know in order to understand the risks of computing on the Internet and what they can do to protect themselves. Tony Bradley is the Guide for the About.com site for Internet Network Security. In his role managing the content for a site that has over 600,000 page views per month and a weekly newsletter with 25,000 subscribers, Tony has learned how to talk to people, everyday people, about computer security. Intended for the security illiterate, Essential Computer Security is a source of jargon-less advice everyone needs to operate their computer securely. * Written in easy to understand non-technical language that novices can comprehend * Provides detailed coverage of the essential security subjects that everyone needs to know * Covers just enough information to educate without being overwhelming About the Author Tony Bradley, CISSP-ISSAP, is the Guide for the About.com site for Internet / Network Security. He has written for a variety of other web sites and publications including SearchSecurity.com, WindowsNetworking.com, Smart Computing Magazine and Information Security Magazine. Currently a security architect and consultant for a Fortune 100 company, Tony has driven security policies and technologies for antivirus and incident response for Fortune 500 companies and he has been network administrator and technical support for smaller companies. He is Microsoft Certified as an MCSE (Microsoft Certified Systems Engineer) and MCSA (Microsoft Certified Systems Administrator) in Windows 2000 and an MCP (Microsoft Certified Professional) in Windows NT. He has on average over 600,000 page views per month and 25,000 subscribers to his weekly newsletter. He created a 10-part Computer Security 101 Class which has had thousands of participants since its creation and continues to gain in popularity through word of mouth.

Probabilistic Foundations of Statistical Network Analysis presents a fresh and insightful perspective on the fundamental tenets and major challenges of modern network analysis. Its lucid exposition provides necessary background for understanding the essential ideas behind exchangeable and dynamic network models, network sampling, and network statistics such as sparsity and power law, all of which play a central role in contemporary data science and machine learning applications. The book rewards readers with a clear and intuitive understanding of the subtle interplay between basic principles of statistical inference, empirical properties of network data, and technical concepts from probability theory. Its mathematically rigorous, yet non-technical, exposition makes the book accessible to professional data scientists, statisticians, and computer scientists as well as practitioners and researchers in substantive fields. Newcomers and non-quantitative researchers will find its conceptual approach invaluable for developing intuition about technical ideas from statistics and probability, while experts and graduate students will find the book a handy reference for a wide range of new topics, including edge exchangeability, relative exchangeability, graphon and graphex models, and graph-valued Levy process and rewiring models for dynamic networks. The author’s incisive commentary supplements these core concepts, challenging the reader to push beyond the current limitations of this emerging discipline. With an approachable exposition and more than 50 open research problems and exercises with solutions, this book is ideal for advanced undergraduate and graduate students interested in modern network analysis, data science, machine learning, and statistics. Harry Crane is Associate Professor and Co-Director of the Graduate Program in Statistics and Biostatistics and an Associate Member of the Graduate Faculty in Philosophy at Rutgers University. Professor Crane’s research interests cover a range of mathematical and applied topics in network science, probability theory, statistical inference, and mathematical logic. In addition to his technical work on edge and relational exchangeability, relative exchangeability, and graph-valued Markov processes, Prof. Crane’s methods have been applied to domain-specific cybersecurity and counterterrorism problems at the Foreign Policy Research Institute and RAND’s Project AIR FORCE.

Essential Statistics, Global Edition By 作者: Ryan Goulde ISBN-10 书号: 1292161221 ISBN-13 书号: 9781292161228 Edition 版本: 2nd edition 出版日期: 2017-07-10 pages 页数: (584 ) $999.99 This book is ideal for a one-semester course in statistics, offering a streamlined presentation of Introductory Statistics: Exploring the World through Data, by Gould/Ryan. Exploring the World through Data We live in a data-driven world, and the goal of this text is to teach students how to access and analyze these data critically. Authors Rob Gould, Colleen Ryan, and Rebecca Wong want students to develop a “data habit of mind” because learning statistics is an essential life skill that extends beyond the classroom. Regardless of their math backgrounds, students will learn how to think about data and how to reason using data. With a clear, unintimidating writing style and carefully chosen pedagogy, this text makes data analysis accessible to all students. Contents Preface Index of Applications Chapter 1:Introduction to Data Chapter 2:Picturing Variation with Graphs Chapter 3:Numerical Summaries of Center and Variation Chapter 4:Regression Analysis:Exploring Associations between Variables Chapter 5:Modeling Variation with Probability Chapter 6:Modeling Random Events:The Normal and Binomial Models Chapter 7:Survey Sampling and Inference Chapter 8:Hypothesis Testing for Population Proportions Chapter 9:Inferring Population Means Chapter 10:Analyzing Categorical Variables and Interpreting Research Appendix A:Tables Appendix B:Check Your Tech Answers Appendix C:Answers to Odd-Numbered Exercises Appendix D:Credits

4,356

社区成员

28,926

社区内容

发帖

与我相关

我的任务

社区管理员

加入社区

近7日
近30日
至今

加载中

查看更多榜单

社区公告

暂无公告

试试用AI创作助手写篇文章吧

+ 用AI写文章