Different Types of Network Security Protocols
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The Security and Management of Computer Network Database In
The Security and Management of Computer Network Database in Coal Quality Detection Jianhua SHI1, a, Jinhong SUN2 1Guizhou Agency of Quality Supervision and Inspection of Coal Product,Liupanshui city 553001,China [email protected] Keywords: Computer Network Database; Database Security; Coal Quality Detection Abstract. This paper research the results of quality management information system at home and abroad, through the analysis of the domestic coal enterprises coal quality management links and management information system development present situation and existing problems, combining with related theory and system development method of management information system, and according to the coal mining enterprises of computer network security and management, analysis and design of database, and the implementation steps and the implementation of the coal quality management information system of the problem are given their own countermeasure and the suggestion, try to solve demand for management information system of coal enterprise management level, thus improve the coal quality management level and economic benefit of coal enterprise. Introduction With the improvement of China's coal mining mechanization degree and the increase of mining depth, coal quality is on the decline as a whole. At the same time, the user of coal product utilization way more and more widely, use more and more diversified, more and higher to the requirement of coal quality. In coal quality issue, therefore, countless contradictions increasingly acute, the gap of -
LAB MANUAL for Computer Network
LAB MANUAL for Computer Network CSE-310 F Computer Network Lab L T P - - 3 Class Work : 25 Marks Exam : 25 MARKS Total : 50 Marks This course provides students with hands on training regarding the design, troubleshooting, modeling and evaluation of computer networks. In this course, students are going to experiment in a real test-bed networking environment, and learn about network design and troubleshooting topics and tools such as: network addressing, Address Resolution Protocol (ARP), basic troubleshooting tools (e.g. ping, ICMP), IP routing (e,g, RIP), route discovery (e.g. traceroute), TCP and UDP, IP fragmentation and many others. Student will also be introduced to the network modeling and simulation, and they will have the opportunity to build some simple networking models using the tool and perform simulations that will help them evaluate their design approaches and expected network performance. S.No Experiment 1 Study of different types of Network cables and Practically implement the cross-wired cable and straight through cable using clamping tool. 2 Study of Network Devices in Detail. 3 Study of network IP. 4 Connect the computers in Local Area Network. 5 Study of basic network command and Network configuration commands. 6 Configure a Network topology using packet tracer software. 7 Configure a Network topology using packet tracer software. 8 Configure a Network using Distance Vector Routing protocol. 9 Configure Network using Link State Vector Routing protocol. Hardware and Software Requirement Hardware Requirement RJ-45 connector, Climping Tool, Twisted pair Cable Software Requirement Command Prompt And Packet Tracer. EXPERIMENT-1 Aim: Study of different types of Network cables and Practically implement the cross-wired cable and straight through cable using clamping tool. -
Applied Combinatorics 2017 Edition
Keller Trotter Applied Combinatorics 2017 Edition 2017 Edition Mitchel T. Keller William T. Trotter Applied Combinatorics Applied Combinatorics Mitchel T. Keller Washington and Lee University Lexington, Virginia William T. Trotter Georgia Institute of Technology Atlanta, Georgia 2017 Edition Edition: 2017 Edition Website: http://rellek.net/appcomb/ © 2006–2017 Mitchel T. Keller, William T. Trotter This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 Interna- tional License. To view a copy of this license, visit http://creativecommons.org/licenses/ by-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. Summary of Contents About the Authors ix Acknowledgements xi Preface xiii Preface to 2017 Edition xv Preface to 2016 Edition xvii Prologue 1 1 An Introduction to Combinatorics 3 2 Strings, Sets, and Binomial Coefficients 17 3 Induction 39 4 Combinatorial Basics 59 5 Graph Theory 69 6 Partially Ordered Sets 113 7 Inclusion-Exclusion 141 8 Generating Functions 157 9 Recurrence Equations 183 10 Probability 213 11 Applying Probability to Combinatorics 229 12 Graph Algorithms 239 vii SUMMARY OF CONTENTS 13 Network Flows 259 14 Combinatorial Applications of Network Flows 279 15 Pólya’s Enumeration Theorem 291 16 The Many Faces of Combinatorics 315 A Epilogue 331 B Background Material for Combinatorics 333 C List of Notation 361 Index 363 viii About the Authors About William T. Trotter William T. Trotter is a Professor in the School of Mathematics at Georgia Tech. He was first exposed to combinatorial mathematics through the 1971 Bowdoin Combi- natorics Conference which featured an array of superstars of that era, including Gian Carlo Rota, Paul Erdős, Marshall Hall, Herb Ryzer, Herb Wilf, William Tutte, Ron Gra- ham, Daniel Kleitman and Ray Fulkerson. -
Understanding Wireless Security on Your Spectralink 84-Series
Best Practices Understanding Wireless Security on Your Spectralink Spectralink 84-Series Wireless Phones Spectralink’s 84-Series wireless phones meet the highest security requirements. By the time you deploy your 84-Series wireless phones, most of your basic security issues have already been ironed out by AP vendors and security servers to conform to federal regulations in place to protect personal privacy. Medical information, for example, is protected by HIPPA (Health Insurance Portability and Accountability Act) or PCI (Payment Card Industry). If you have general security questions after the deployment of your 84-Series phone, this best practices document should have the answers, or at least point you in the right direction. System Affected 84-Series Handsets Some Basics About Encryption and Authentication On Wi-Fi networks there can be a trade-off between good security and good audio. The most rigorous enterprise-level security can protect against eavesdropping and unauthorized toll calls, but it can also increase server demand, resulting in latency and audio packet loss. Implementing less robust, personal-level security measures will reduce server processing demands, ease configuration, and smooth audio flow through your network, but may not provide adequate security for many enterprise Wi-Fi networks. The good news: Proper configuration of 84-Series phones offers the best of both worlds, ensuring excellent audio in the most robust security environments. Table 1 highlights the correlation between security and audio relating to various Wi-Fi encryption and authentication techniques, with considerations for configuring the phones for the best security and audio. Number? March 2015 Best Practices Understanding Wireless Security Table 1: Enterprise Environment Security Trade-Offs Wireless Security in Audio Ease of Configuration and Other General Information Security Enterprise Method Environments WEP Poor Excellent Easy to administer, little processing overhead, adequate security for many home wi-fi networks. -
Steps Toward a National Research Telecommunications Network
Steps Toward a National Research Telecommunications Network Gordon Bell Introduction Modern science depends on rapid communica- In response to provisions in Public Law tions and information exchange. Today, many major 99-383, which was passed 21 June 1986 by national and international networks exist using the 99th Congress, an inter-agency group some form of packet switching to interconnect under the auspices of the Federal Coordin- host computers. State and regional networks are ating Council for Science, Engineering, and proliferating. NSFNET, an "internet" designed initially Technology (FCCSET) for Computer Research to improve access to supercomputer centers, has and Applications was formed to study the in the space of two years, forged links among 17 following issues: the networking needs of state, regional, and federal agency networks. the nation's academic and federal research In the early 1980s, the lack of access to super- computer programs, including supercomputer computing power by the research community caused programs, over the next 15 years, addressing the formation of the NSF Office of Advanced Sci- requirements in terms of volume of data, entific Computing, which funded five centers for reliability of transmission, software supercomputers. Given the highly distributed loca- compatibility, graphics capabilities, and tion of users, the need for a national wide area transmission security; the benefits and network for computer access and for the inter- opportunities that an improved computer change of associated scientific information (such network would offer for electronic mail, as mail, files, databases) became clear. file transfer, and remote access and com- Further, it immediately became obvious that munications; and the networking options existing agency networks both lacked the inherent available for linking academic and research capacity and were overloaded. -
Security Gateway Overview
Security Gateway Overview This chapter contains general overview information about the Security Gateway (SecGW) running on an VPC-DI Virtualized Service Module (VSM) as a VPC-VSM instance. The following topics are covered in this chapter: • Product Overview, page 1 • Network Deployment, page 3 • Packet Flow, page 4 • Standards, page 4 Product Overview The SecGW is a high-density IP Security (IPSec) gateway for mobile wireless carrier networks. It is typically used to secure backhaul traffic between the Radio Access Network (RAN) and the operator core network. IPSec is an open standards set that provides confidentiality, integrity, and authentication for data between IP layer peers. The SecGW uses IPSec-protected tunnels to connect outside endpoints. SecGW implements the parts of IKE/IPSec required for its role in mobile networks. The following types of LTE traffic may be carried over encrypted IPSec tunnels in the Un-trusted access domain: • S1-C and S1-U: Control and User Traffic between eNodeB and EPC • X2-C and X2-U: Control and User Traffic between eNodeBs during Handoff SecGW Administration Guide, StarOS Release 21.3 1 Security Gateway Overview SecGW Application • SPs typically carry only Control Traffic, however there exists a case for carrying non-Internet User traffic over secured tunnels Figure 1: SecGW Implementation SecGW Application The StarOS-based Security Gateway (SecGW) application is a solution for Remote-Access (RAS) and Site-to-Site (S2S) mobile network environments. It is implemented via StarOS as a WSG (Wireless Security Gateway) service that leverages the IPSec features supported by StarOS. For complete descriptions of supported IPSec features, see the IPSec Reference. -
Components of a Computer Network
CS 536 Park Introduction What is a computer network? Components of a computer network: • hosts (PCs, laptops, handhelds) • routers & switches (IP router, Ethernet switch) • links (wired, wireless) • protocols (IP, TCP, CSMA/CD, CSMA/CA) • applications (network services) • humans and service agents Hosts, routers & links form the hardware side. Protocols & applications form the software side. Protocols can be viewed as the “glue” that binds every- thing else together. CS 536 Park A physical network: CS 536 Park Protocol example: low to high • NIC (network interface card): hardware → e.g., Ethernet card, WLAN card • device driver: part of OS • ARP, RARP: OS • IP: OS • TCP, UDP: OS • OSPF, BGP, HTTP: application • web browser, ssh: application −→ multi-layered glue What is the role of protocols? −→ facilitate communication or networking CS 536 Park Simplest instance of networking problem: Given two hosts A, B interconnected by some net- work N, facilitate communication of information between A & B. A N B Information abstraction • representation as objects (e.g., files) • bytes & bits → digital form • signals over physical media (e.g., electromagnetic waves) → analog form CS 536 Park Minimal functionality required of A, B • encoding of information • decoding of information −→ data representation & a form of translation Additional functionalities may be required depending on properties of network N • information corruption → 10−9 for fiber optic cable → 10−3 or higher for wireless • information loss: packet drop • information delay: like toll -
Introduction to Bioinformatics (Elective) – SBB1609
SCHOOL OF BIO AND CHEMICAL ENGINEERING DEPARTMENT OF BIOTECHNOLOGY Unit 1 – Introduction to Bioinformatics (Elective) – SBB1609 1 I HISTORY OF BIOINFORMATICS Bioinformatics is an interdisciplinary field that develops methods and software tools for understanding biologicaldata. As an interdisciplinary field of science, bioinformatics combines computer science, statistics, mathematics, and engineering to analyze and interpret biological data. Bioinformatics has been used for in silico analyses of biological queries using mathematical and statistical techniques. Bioinformatics derives knowledge from computer analysis of biological data. These can consist of the information stored in the genetic code, but also experimental results from various sources, patient statistics, and scientific literature. Research in bioinformatics includes method development for storage, retrieval, and analysis of the data. Bioinformatics is a rapidly developing branch of biology and is highly interdisciplinary, using techniques and concepts from informatics, statistics, mathematics, chemistry, biochemistry, physics, and linguistics. It has many practical applications in different areas of biology and medicine. Bioinformatics: Research, development, or application of computational tools and approaches for expanding the use of biological, medical, behavioral or health data, including those to acquire, store, organize, archive, analyze, or visualize such data. Computational Biology: The development and application of data-analytical and theoretical methods, mathematical modeling and computational simulation techniques to the study of biological, behavioral, and social systems. "Classical" bioinformatics: "The mathematical, statistical and computing methods that aim to solve biological problems using DNA and amino acid sequences and related information.” The National Center for Biotechnology Information (NCBI 2001) defines bioinformatics as: "Bioinformatics is the field of science in which biology, computer science, and information technology merge into a single discipline. -
Application of Bioinformatics Methods to Recognition of Network Threats
View metadata, citation and similar papers at core.ac.uk brought to you by CORE Paper Application of bioinformatics methods to recognition of network threats Adam Kozakiewicz, Anna Felkner, Piotr Kijewski, and Tomasz Jordan Kruk Abstract— Bioinformatics is a large group of methods used in of strings cacdbd and cawxb, character c is mismatched biology, mostly for analysis of gene sequences. The algorithms with w, both d’s and the x are opposite spaces, and all developed for this task have recently found a new application other characters are in matches. in network threat detection. This paper is an introduction to this area of research, presenting a survey of bioinformatics Definition 2 (from [2]) : A global multiple alignment of methods applied to this task, outlining the individual tasks k > 2 strings S = S1,S2,...,Sk is a natural generalization and methods used to solve them. It is argued that the early of alignment for two strings. Chosen spaces are inserted conclusion that such methods are ineffective against polymor- into (or at either end of) each of the k strings so that the re- phic attacks is in fact too pessimistic. sulting strings have the same length, defined to be l. Then Keywords— network threat analysis, sequence alignment, edit the strings are arrayed in k rows of l columns each, so distance, bioinformatics. that each character and space of each string is in a unique column. Alignment is necessary, since evolutionary processes intro- 1. Introduction duce mutations in the DNA and biologists do not know, whether nth symbol in one sequence indeed corresponds to When biologists discover a new gene, its function is not al- the nth symbol of the other sequence – a shift is probable. -
Wireless Security Evolution
Wireless Security Evolution Kevin Hayes Distinguished Engineer Atheros Communications AboutAbout myselfmyself Engineer for Atheros Communications since 2000 Interests in OS and systems design, L2/L3 networking, QoS and security Participant/Contributor to IEEE 802.11 TGf (Inter Access Point Protocols) TGi (WLAN Security) TGk (Radio system measurement) TGn (High rate WLAN) TGr (Fast, secure handoff) TGs (WLAN mesh) TGw (Security for WLAN Management Frames) 2 WirelessWireless isis RockingRocking OurOur World!World! Devices Traditional WLAN connectivity (laptops, APs) CE devices Sony PSP, Microsoft Zune, Satellite+WLAN media players, … VOIP phones Services Hotspot connectivity Gateways controlled by service providers Video distribution – IPTV Skype and other voice services Other streaming services – iTunes, Rhapsody See http://www.wi-fi.org for list of WFA certified devices 3 We’veWe’ve beenbeen herehere beforebefore Circa 1994, connection was king, no security awareness Connection speed was measurement of connection quality 19.2 Kbps…woo-hoo! No e-commerce, No SSL Rare for brick-n-mortar enterprise to have Net presence, let alone a firewall Today, we have reasonable Net security. But the WLAN cometh: >60% home wireless networks unsecured Wireless usage model presents new opportunities to attackers Many more threats than before Users expect wireless connections to add no new security exposure We need standards to design security into WLANs 4 802.11802.11 backgroundbackground IEEE 802.11 is a subset of IEEE 802 LAN -
Wi-Fi Protected Access: Strong, Standards-Based, Interoperable Security for Today's Wi-Fi Networks Wi-Fi Alliance April 29, 2
Wi-Fi Protected Access: Strong, standards-based, interoperable security for today’s Wi-Fi networks Wi-Fi Alliance April 29, 2003 © 2003 Wi-Fi Alliance. Wi-Fi® is a registered trademark of the Wi-Fi Alliance Executive Summary The Wi-Fi Alliance, working in conjunction with the Institute of Electrical and Electronics Engineers (IEEE), has brought a strong interoperable Wi-Fi security specification to market in the form of Wi-Fi Protected Access (WPA). WPA greatly increases the level of over-the-air data protection and access control on existing and future Wi-Fi networks. It addresses all known weaknesses of Wired Equivalent Privacy (WEP), the original native security mechanism in the 802.11 standard. Although no security solution can claim to be “bullet-proof,” WPA represents a quantum leap forward in Wi-Fi security. WPA is built on standards-based interoperable security enhancements. It brings forward features of the forthcoming IEEE 802.11i standard that can be implemented immediately. WPA not only provides strong data encryption to correct WEP’s weaknesses, it adds user authentication which was largely missing in WEP. WPA is designed to secure all versions of 802.11 devices, including 802.11b, 802.11a, and 802.11g, multi-band and multi-mode. As a subset of 802.11i (also known as WPA2), WPA is both forward and backward-compatible and is designed to run on existing Wi-Fi devices as a software download. .As such, WPA devices should work well with the WPA2 devices expected to appear in the market in 2004. The Wi-Fi Alliance, which conducts interoperability tests on Wi-Fi devices, is now testing devices for WPA interoperability. -
INTRODUCTION E-Commerce Is a Technology-Mediated Exchange
INTRODUCTION E-commerce is a technology-mediated exchange between parties (individuals or organizations) as well as the electronically based intra-or inter- organizational activities that facilitate such exchanges. It is the business option in which the transactions take place via telecommunications networks. It changes the way you shop, learn, interact and transact business; this wave of emerging technology affects every facet of your lifestyle, home as well as your workplace. E-commerce is directly or indirectly applicable in all areas of our life be it banking, entertainment, on line orders processing cycle or SCM (Supply Chain Management). Due to its wide variety of applications e-commerce has gained a lot of popularity over the decade. It has drawn the attention of researchers regarding the new technologies and resolving the security issues regarding the electronic transactions. Fig 1.1 Different Application areas of E-Commerce E-commerce has been defined broadly as the business transactions of business over the achieving greater efficiencies within their organization using information technology, the last half of this decade is seeing a new wave of increased efficiencies by extending the information technology to the Web, both to the trading partners, as well as to end consumers. While efficiencies lead to increased profitability, the Web offers other advantages, such as a greater reach, short-term relationships, one-to-one marketing, re-intermediation, disintermediation etc. which are either difficult, or impossible to do in the traditional physical economy. Obviously, electronic commerce will first pass through the phase of “electronification” of current trading practices, and only later evolve into something radically different from its physical counterpart.