Working of Intrusion Detection System

Duration: 3 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the course: About the Course
  2. General Knowledge: Polity, Physics, Biology, State Wise GK, Chemistry, History, Geography, GK- Current Affairs, Indian Economy, Static General Knowledge, Environment, Evolution of Indian Banking (Banking & Financial Awareness)
  3. Mental Aptitude and Reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Permutation and Combination, Number System, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Vocabulary, Profit and Loss, Arithmetic, Mental Ability, Percentage, Algebra, Mensuration and Geometry, Age Problems, Clock, Calendar, Verbal Analogy (Word Based Analogy), Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Analogy, Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Selection Decision Table (Decision Making), Cubes & Dices, Blood Relations, Venn Diagram, Logical Sequence Of Words, Inequality, Directions (Direction Test), Data Arrangement, Facts, Inference and Judgements, Syllogisms, Seating Arrangements, Ranking, Order and Sequence
  4. CS | Computer Fundamentals: Basics of COA, Number System, Number Representation, C Fundamentals, Algorithm Analysis, Input Output Organisation
  5. CS | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, SQL
  6. CS | Workplace productivity Tools: MS Office Applications, Keyboard Shortcuts
  7. CS | Computer Networks: Introduction to CN, Data Communication, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, Application Layer, Hardware Basics, Network Security
  8. CS | The Internet: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Web Publishing & Hosting, Server Side & Security, Emerging Technologies
  9. CS | Emerging Technologies: Artificial Intelligence, Emerging Tech Trends, Introduction to OS, Windows OS, Linux OS, Unix OS, JavaScript-Basics
  10. CS | Boolean algebra: Digital Systems & Boolean Basics, Boolean Expression, Boolean Minimization, Logic Gates & Hardware
  11. CS | Data Structures: Introduction to DS, Array, Stack, Queue
  12. CS | Cryptography: Society, Law & Ethics, 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
  13. UP Police Previous Year Papers:
  14. UP Police Full Mock Tests:
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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