Working of Intrusion Detection System

Duration: 3 min

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Inside: a video lesson and guided study material.

Module outline

  1. Numerical Ability & Problem Solving: Speed Mathematics and Basic Mathematics, Arithmetic, Number System, HCF LCM, Divisibility Rules, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Time and Work, Pipe and Cistern, Speed Time and Distance, Age Problems, Partnership, Data Interpretation, Mental Ability, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Logarithm, Mensuration and Geometry, Permutation and Combination, Probability, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Sentence Structure and Correction, Data Sufficiency, Trigonometry, Measurement and Quantity Take-Off, Signal Space and Optimum Detection, Probability, Statistics, Algebra, Time and Work, Speed, Time and Distance, Data Interpretation, Combinatorics
  2. Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Logical Sequence Of Words, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Selection Decision Table (Decision Making), Alphabet and Word Tests, Numerical Reasoning, Number System, Averages, Mixtures and Alligation, Percentages, Series Completion, Analogy and Classification, Patterns in Two-Dimensional Figures, Coding and Decoding, Mathematical Operations, Direction Sense, Logical Deduction and Induction, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Traverse Surveying, Ratio and Proportion, Mensuration, Permutations and Combinations, Clocks and Calendars, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations
  3. General Knowledge & Current Affairs (India + Rajasthan): History, Geography, Polity, Indian Economy, Static General Knowledge, State Wise GK, GK- Current Affairs, Environment, Physics
  4. Computer Fundamentals & Operating Systems: Basics of COA, Floating Point Rep, Digital Systems & Boolean Basics, Number Representation, Number System, Introduction to OS, File Management, Windows OS, Unix OS, Linux OS, Register Transfer and Microoperations, Virtual Memory
  5. Computer Networks: Introduction to CN, Data Communication, DLL: Error Control, DLL: Access Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Application Layer, Hardware Basics, Network Security
  6. Cyber Security: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking
  7. Programming (C & OOP): C Fundamentals, Control Flow, Arrays & Pointers, Functions, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Operators & Expressions, Sorting Algorithms, Java Fundamentals, Java
  8. MS Office & Data Processing: MS Office Applications, Basics of DBMS
  9. Internet & Web Technology: Society, Law & Ethics, Terms & Abbreviations, Keyboard Shortcuts, Emerging Tech Trends, Artificial Intelligence, Emerging Technologies, Internet Fundamentals, Website, Browser & Services, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture begins by detailing common methods of intrusion used by attackers to bypass security measures. The instructor explains techniques such as Address Spoofing, Fragmentation, Pattern Evasion, and Coordinated Attacks. She then illustrates the architecture of an Intrusion Detection System (IDS) using a hand-drawn network diagram, showing the flow from the Internet through a Firewall to a LAN and Workstations. The session concludes by introducing the classification of IDS, specifically defining Network Intrusion Detection Systems (NIDS) and their role in monitoring subnet traffic.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor presents a slide titled 'Common Methods of Intrusion', listing Address Spoofing, Fragmentation, Pattern Evasion, and Coordinated Attack. She writes 'IDS' and 'cmd.exe -> C:\win32.exe' on the board. A network diagram is drawn showing the Internet, Firewall, IDS, LAN, and Workstations. Handwritten notes include 'monitor', 'traffic', 'Real signature pattern', 'Suspect Alert', 'Admin', and 'rules UP'. The instructor explains that IDS involves both software and hardware components to detect intrusions.

  2. 2:00 – 2:55 02:00-02:55

    The video transitions to a slide titled 'Classification of Intrusion Detection System (IDS)'. The text states that IDS are classified into 5 types. The first type, 'Network Intrusion Detection System (NIDS)', is highlighted. The slide text explains that NIDS are set up at a planned point to examine traffic from all devices, observing passing traffic on the entire subnet and matching it to known attacks to send alerts to the administrator.

The lecture progresses from identifying specific attack vectors like spoofing and fragmentation to explaining the defensive mechanisms of Intrusion Detection Systems. The instructor visually demonstrates how an IDS monitors network traffic, compares it against real signature patterns, and generates alerts for administrators. Finally, the lesson categorizes these systems, providing a detailed definition of Network Intrusion Detection Systems (NIDS) and their function in examining subnet traffic for known attack signatures.

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