wireless communication system and network notes
Tài liệu OPTICAL WIRELESS COMMUNICATION SYSTEM doc
... in Chapter 2, the system is modeled with basic communication subsystems as stated in the project’s scope of work. The first design consists of basic OWC communication system and is shown in ... concepts and theories of intersatellite communication and OWC system was discussed. Previous researches of [2] and [12] were also presented. Several IsOWC applications which are data relaying and ... Presentation and Thesis Writing 3.8 Conclusions 23 25 25 25 26 26 27 27 4 SYSTEM MODELING 4.1 Introduction 4.2 OptiSystem Software 4.3 System Model in OptiSystem 4.4 System Components...
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The CERT® Guide to System and Network Security Practices pdf
... CERT® GUIDE TO SYSTEM AND NETWORK SECURITY PRACTICES8 THE CERT® GUIDE TO SYSTEM AND NETWORK SECURITY PRACTICESTo Identify and Enable Systems and Network Logging MechanismsIdentify and Install ... establishment and maintenance of secure configura-tions and the secure operations of critical assets.Most system and network administrators have developed their knowledge of how toprotect and secure systems ... following informa-tion assets:• Detection tools•Networks• Systems (including processes and user behavior)• Network and system performance• Files and directories• Hardware• Access to physical...
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Nagios: System and Network Monitoring potx
... target system can only be reached throughaparticular router that hasjustgonedown,then Nagios reports that thetargetsystem is “unreachable”, anddoesnot bother tobombarditwithfurther host andservicechecks.The ... andrepresentingthe performancedataprovided by plugins, whichare describedindetail in Chapter 17.Networksare rarely homogeneous, that is,equippedonlywithLinux andotherUnix-based operating systems. ... twocen-tral configuration files nagios.cfg and cgi.cfg,while Rapidly Changing States:Flapping and EventHandler aredevoted to some useful butsomewhatexoticfea-tures.Furthernotes on thebookAt thetimeofgoing...
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Bài tập lớn ITSS Linux System and Network Management
... NỘIVIỆN CÔNG NGHỆ THÔNG TIN VÀ TRUYỀN THÔNG──────── * ───────BÀI TẬP LỚNMÔN: ITSS Linux System and Network Management Sinh viên thực hiện: Nguyễn Đức Hiếu (Nhóm trưởng)Phan Quốc KhánhTrần ... Thiết lập domain name:nano /etc/sysconfig /network edit domain name "server1.hhkd1570.vn"- Config custom static ipnano /etc/sysconfig /network- scripts/ifcfg-eth1 DEVICE=eth1BOOTPROTO=staticnm_controlled=noIPADDR=10.0.10.1NETMASK=255.255.255.0BROADCAST=10.0.10.255 NETWORK= 10.0.10.0DEFROUTE=yes- ... giữa 2 máy (accept, drop, reject,…)• Trước hết cần forward traffic từ private network 10.0.10.0/24 trên eth1 sang network trên eth0- Thêm cấu hình vào file cfg-eth1 để có gateway forward:Nhập...
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Computer and Network Security: MIT 6.857 Class Notes pptx
... 6.857 Computer and Network Security Class Notes 1File: http://theory.lcs.mit.edu/˜rivest /notes/ notes.pdf Revision: December 2, 2002Computer and Network SecurityMIT 6.857 Class Notes by Ronald ... personal use.MIT 6.857 Computer and Network Security Class Notes 4File: http://theory.lcs.mit.edu/˜rivest /notes/ divisors.pdf Revision: December 2, 2002Divisors and DivisibilityDefinition 1 (Divides ... Computer and Network Security Class Notes 5File: http://theory.lcs.mit.edu/˜rivest /notes/ flt.pdf Revision: December 2, 2002Fermat’s Little TheoremTheorem 1 (Fermat’s Little Theorem) If p is prime and...
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MEMS-based Circuits and Systems for Wireless Communication docx
... Switzerlande-mail: marc-alexandre.dubois@csem.ch; claude.muller@csem.chC.C. Enz and A. Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, ... 333, USAe-mail: piazza@ece.cmu.eduC.C. Enz and A. Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, DOI 10.1007/978-1-4419-8798-32,© ... Microtechnique,Neuchˆatel, SwitzerlandMarkus Dielacher Infineon Technologies, Graz, AustriaMarc-Alexandre Dubois Swiss Center for Electronics and Microtechnology(CSEM S.A.), Neuchˆatel, SwitzerlandBertrand Dubus...
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Báo cáo hóa học: " Research Article Signal Processing by Generalized Receiver in DS-CDMA Wireless Communication Systems with Optimal Combining and Partial Cancellation" docx
... additional filter (the linear system) , and the PF is thepreliminary filter (the linear system) . A detailed discussion oftheAFandPFcanbefoundin[2, pages 233–243 and 264–284] and [5]. Consider briefly ... Parallel and Distributed Computing and Networks (PDCN ’04),pp.195–200, Innsbruck, Austria, February 2004.[30] J.H.Kim,V.Tuzlukov,W.S.Yoon,andY.D.Kim,“Macrodi-versity in wireless sensor networks ... systems with randomsignature sequences,” IEEE Transactions on Communications,vol. 37, no. 10, pp. 1052–1061, 1989.[35] J. C. Liberti Jr . and T. S. Rappaport, Smart Antennas for Wireless Communications:...
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Mobile Communication System Evolution
... Background, and Objectives’’ , Bell System Technical Journal, 58(1); 1–14.[WAL-99] B.H. Walke, Mobile Radio Networks Networking and Protocols, Wiley, Chichester, 1999.Mobile Satellite Communication Networks42termination ... South Korea and Japan; and as of 1999, there were 43 wireless local loop (WLL)systems in 22 countries using cmdaOne technology. The co-existence of cmdaOne and GSMnetworks in Australia and China, ... terrestrial IMT-2000 services in the 1885–1980, 2010–2025 and 2110–2170 MHzbands in Regions 1 and 3; and 1885–1980 and 2110–2160 MHz bands in Region 2. This formof service delivery will be discussed...
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Mobile Communication System Evolution
... Right Hand Circular PolarisationRHT Registration Handler TerminalRHVN Registration Handler Visited Network RIMS Ranging and Integrity Monitoring StationMobile Satellite Communication Networks342BFN ... PSKRACE Research and Development in Advanced Communications in EuropeRACH Random Access ChannelRAINBOW Radio Access Independent Broadband On Wireless RC Radio ConfigurationRCS Recursive Systematic ... OrbitNMS Network Management StationNMSS Network Management and Switching SubsystemNMT Nordic Mobile TelephoneNRSC National Remote Sensing CentreNSCC Navigation System Control CentreNSP Network...
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Hands-On Ethical Hacking and Network Defense
... DOES THE WEB APPLICATION REQUIRE AUTHENTICATION OF THE USER?Many Web applications require another server authenticate usersExamine how information is passed between the two serversEncrypted channelsVerify that logon and password information is stored on secure placesAuthentication servers introduce a second target443734APPLICATION VULNERABILITIES COUNTERMEASURES (CONTINUED)Top10 Web application vulnerabilities (continued)Remote administration flawsAttacker can gain access to the Web server through the remote administration interfaceWeb and application server misconfigurationAny Web server software out of the box is usually vulnerable to attackDefault accounts and passwordsOverly informative error messages3216WEB FORMSUse the <form> element or tag in an HTML documentAllows customer to submit information to the Web serverWeb servers process information from a Web form by using a Web applicationEasy way for attackers to intercept data that users submit to a Web server7APPLICATION VULNERABILITIES COUNTERMEASURESOpen Web Application Security Project (OWASP)Open, notforprofit organization dedicated to finding and fighting vulnerabilities in Web applicationsPublishes the Ten Most Critical Web Application Security VulnerabilitiesTop10 Web application vulnerabilitiesUnvalidated parametersHTTP requests are not validated by the Web serverBroken access controlDevelopers implement access controls but fail to test them properly29USING SCRIPTING LANGUAGESDynamic Web pages can be developed using scripting languagesVBScriptJavaScriptPHP18OPEN DATABASE CONNECTIVITY (ODBC) (CONTINUED)ODBC definesStandardized representation of data typesA library of ODBC functionsStandard methods of connecting to and logging on to a DBMS24WEB APPLICATION COMPONENTSStatic Web pagesCreated using HTMLDynamic Web pagesNeed special components<form> tagsCommon Gateway Interface (CGI)Active Server Pages (ASP)PHPColdFusionScripting languagesDatabase connectors6APACHE WEB SERVERTomcat Apache is another Web Server programTomcat Apache hosts anywhere from 50% to 60% of all Web sitesAdvantagesWorks on just about any *NIX and Windows platformIt is freeRequires Java 2 Standard Runtime Environment (J2SE, version 5.0)15ON WHAT PLATFORM WAS THE WEB APPLICATION DEVELOPED?Several different platforms and technologies can be used to develop Web applicationsAttacks differ depending on the platform and technology used to develop the applicationFootprinting is used to find out as much information as possible about a target system The more you know about a system the easier it is to gather information about its vulnerabilities45OPEN DATABASE CONNECTIVITY (ODBC)Standard database access method developed by the SQL Access GroupODBC interface allows an application to accessData stored in a database management system Any system that understands and can issue ODBC commandsInteroperability among backend DBMS is a key feature of the ODBC interface2348UNDERSTANDING WEB APPLICATIONSIt is nearly impossible to write a program without bugsSome bugs create security vulnerabilitiesWeb applications also have bugsWeb applications have a larger user base than standalone applicationsBugs are a bigger problem for Web applications5DOES THE WEB APPLICATION CONNECT TO A BACKEND DATABASE SERVER? (CONTINUED)Basic testing should look forWhether you can enter text with punctuation marksWhether you can enter a single quotation mark followed by any SQL keywordsWhether you can get any sort of database error when attempting to inject SQL43DOES THE WEB APPLICATION USE DYNAMIC WEB PAGES?Static Web pages do not create a security environmentIIS attack exampleSubmitting a specially formatted URL to the attacked Web serverIIS does not correctly parse the URL informationAttackers could launch a Unicode exploithttp://www.nopatchiss.com/scripts/ ... DOES THE WEB APPLICATION REQUIRE AUTHENTICATION OF THE USER?Many Web applications require another server authenticate usersExamine how information is passed between the two serversEncrypted channelsVerify that logon and password information is stored on secure placesAuthentication servers introduce a second target443734APPLICATION VULNERABILITIES COUNTERMEASURES (CONTINUED)Top10 Web application vulnerabilities (continued)Remote administration flawsAttacker can gain access to the Web server through the remote administration interfaceWeb and application server misconfigurationAny Web server software out of the box is usually vulnerable to attackDefault accounts and passwordsOverly informative error messages3216WEB FORMSUse the <form> element or tag in an HTML documentAllows customer to submit information to the Web serverWeb servers process information from a Web form by using a Web applicationEasy way for attackers to intercept data that users submit to a Web server7APPLICATION VULNERABILITIES COUNTERMEASURESOpen Web Application Security Project (OWASP)Open, notforprofit organization dedicated to finding and fighting vulnerabilities in Web applicationsPublishes the Ten Most Critical Web Application Security VulnerabilitiesTop10 Web application vulnerabilitiesUnvalidated parametersHTTP requests are not validated by the Web serverBroken access controlDevelopers implement access controls but fail to test them properly29USING SCRIPTING LANGUAGESDynamic Web pages can be developed using scripting languagesVBScriptJavaScriptPHP18OPEN DATABASE CONNECTIVITY (ODBC) (CONTINUED)ODBC definesStandardized representation of data typesA library of ODBC functionsStandard methods of connecting to and logging on to a DBMS24WEB APPLICATION COMPONENTSStatic Web pagesCreated using HTMLDynamic Web pagesNeed special components<form> tagsCommon Gateway Interface (CGI)Active Server Pages (ASP)PHPColdFusionScripting languagesDatabase connectors6APACHE WEB SERVERTomcat Apache is another Web Server programTomcat Apache hosts anywhere from 50% to 60% of all Web sitesAdvantagesWorks on just about any *NIX and Windows platformIt is freeRequires Java 2 Standard Runtime Environment (J2SE, version 5.0)15ON WHAT PLATFORM WAS THE WEB APPLICATION DEVELOPED?Several different platforms and technologies can be used to develop Web applicationsAttacks differ depending on the platform and technology used to develop the applicationFootprinting is used to find out as much information as possible about a target system The more you know about a system the easier it is to gather information about its vulnerabilities45OPEN DATABASE CONNECTIVITY (ODBC)Standard database access method developed by the SQL Access GroupODBC interface allows an application to accessData stored in a database management system Any system that understands and can issue ODBC commandsInteroperability among backend DBMS is a key feature of the ODBC interface2348UNDERSTANDING WEB APPLICATIONSIt is nearly impossible to write a program without bugsSome bugs create security vulnerabilitiesWeb applications also have bugsWeb applications have a larger user base than standalone applicationsBugs are a bigger problem for Web applications5DOES THE WEB APPLICATION CONNECT TO A BACKEND DATABASE SERVER? (CONTINUED)Basic testing should look forWhether you can enter text with punctuation marksWhether you can enter a single quotation mark followed by any SQL keywordsWhether you can get any sort of database error when attempting to inject SQL43DOES THE WEB APPLICATION USE DYNAMIC WEB PAGES?Static Web pages do not create a security environmentIIS attack exampleSubmitting a specially formatted URL to the attacked Web serverIIS does not correctly parse the URL informationAttackers could launch a Unicode exploithttp://www.nopatchiss.com/scripts/ ... DOES THE WEB APPLICATION REQUIRE AUTHENTICATION OF THE USER?Many Web applications require another server authenticate usersExamine how information is passed between the two serversEncrypted channelsVerify that logon and password information is stored on secure placesAuthentication servers introduce a second target443734APPLICATION VULNERABILITIES COUNTERMEASURES (CONTINUED)Top10 Web application vulnerabilities (continued)Remote administration flawsAttacker can gain access to the Web server through the remote administration interfaceWeb and application server misconfigurationAny Web server software out of the box is usually vulnerable to attackDefault accounts and passwordsOverly informative error messages3216WEB FORMSUse the <form> element or tag in an HTML documentAllows customer to submit information to the Web serverWeb servers process information from a Web form by using a Web applicationEasy way for attackers to intercept data that users submit to a Web server7APPLICATION VULNERABILITIES COUNTERMEASURESOpen Web Application Security Project (OWASP)Open, notforprofit organization dedicated to finding and fighting vulnerabilities in Web applicationsPublishes the Ten Most Critical Web Application Security VulnerabilitiesTop10 Web application vulnerabilitiesUnvalidated parametersHTTP requests are not validated by the Web serverBroken access controlDevelopers implement access controls but fail to test them properly29USING SCRIPTING LANGUAGESDynamic Web pages can be developed using scripting languagesVBScriptJavaScriptPHP18OPEN DATABASE CONNECTIVITY (ODBC) (CONTINUED)ODBC definesStandardized representation of data typesA library of ODBC functionsStandard methods of connecting to and logging on to a DBMS24WEB APPLICATION COMPONENTSStatic Web pagesCreated using HTMLDynamic Web pagesNeed special components<form> tagsCommon Gateway Interface (CGI)Active Server Pages (ASP)PHPColdFusionScripting languagesDatabase connectors6APACHE WEB SERVERTomcat Apache is another Web Server programTomcat Apache hosts anywhere from 50% to 60% of all Web sitesAdvantagesWorks on just about any *NIX and Windows platformIt is freeRequires Java 2 Standard Runtime Environment (J2SE, version 5.0)15ON WHAT PLATFORM WAS THE WEB APPLICATION DEVELOPED?Several different platforms and technologies can be used to develop Web applicationsAttacks differ depending on the platform and technology used to develop the applicationFootprinting is used to find out as much information as possible about a target system The more you know about a system the easier it is to gather information about its vulnerabilities45OPEN DATABASE CONNECTIVITY (ODBC)Standard database access method developed by the SQL Access GroupODBC interface allows an application to accessData stored in a database management system Any system that understands and can issue ODBC commandsInteroperability among backend DBMS is a key feature of the ODBC interface2348UNDERSTANDING WEB APPLICATIONSIt is nearly impossible to write a program without bugsSome bugs create security vulnerabilitiesWeb applications also have bugsWeb applications have a larger user base than standalone applicationsBugs are a bigger problem for Web applications5DOES THE WEB APPLICATION CONNECT TO A BACKEND DATABASE SERVER? (CONTINUED)Basic testing should look forWhether you can enter text with punctuation marksWhether you can enter a single quotation mark followed by any SQL keywordsWhether you can get any sort of database error when attempting to inject SQL43DOES THE WEB APPLICATION USE DYNAMIC WEB PAGES?Static Web pages do not create a security environmentIIS attack exampleSubmitting a specially formatted URL to the attacked Web serverIIS does not correctly parse the URL informationAttackers could launch a Unicode exploithttp://www.nopatchiss.com/scripts/...
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Principles of Digital Communication Systems and Computer Networks
... II trong sách “Principles of Digital Communication Systems and Computer Networks” của nhóm em.Phần I – Các hệ thống truyền thông số(Digital Communation System) Chương 2: Lý Thuyết Thông Tin(Information ... sư truyền thông.Tài liệu tham khảoC. E. Shannon. "A Mathematical Theory of Communication. " Bell System Technical Journal, Vol. 27, 1948.Tất cả các kỹ sư truyền thông phải đọc bài ... Cuốn sách của ông “A Maththemathical Theroy of Communication ” (Một lý thuyết toán học của sự truyền thông tin) được xuất bản trong Tạp chí Bell System Technical là cơ sở cho sự phát triển toàn...
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