Periodic Vs Triggered Update

Duration: 4 min

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Module outline

  1. General Intelligence & Reasoning: Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Logical Sequence Of Words, Syllogisms, Venn Diagram, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Data Sufficiency, Puzzle Solving (Puzzles), Data Arrangement, Cubes & Dices, Calendar, Clock, Arithmetic, Number System, HCF LCM, Verbal Analogy (Word Based Analogy), Visual Recognition and Figure Completion, Paper Folding and Cutting, Transformation of Shapes, Clocks and Calendars, Direction Sense, Cubes and Dice, Patterns in Two-Dimensional Figures, Seating Arrangements, Analogy and Classification, Logical Deduction and Induction, Alphabet and Word Tests, Mathematical Operations, Series Completion, Simplification and Approximation, Coding and Decoding, Numerical Reasoning, Assembling and Grouping of Shapes, Three-Dimensional Patterns and Visualization, Vocabulary, Number System, Averages, Mixtures and Alligation, Simple and Compound Interest, Percentages, Algebra, Speed, Time and Distance, Seating and Arrangement Puzzles, Traverse Surveying, Order, Ranking and Sequence, Constraint Puzzles, Syllogisms and Venn Diagrams, Reading Comprehension, Critical Reasoning, Permutations and Combinations, Narrative Sequencing, Project Monitoring, Resources and Safety, Profit, Loss and Discount, Ratio and Proportion, Time and Work, Mensuration, Data Interpretation, Powers, Surds and Logarithms, Sequences and Series, Articles and Determiners, Sentence Completion, Data Sufficiency, Blood Relations, Simple Interest and Compound Interest, Mixture and Alligation, Sequence and Series (Series), Speed Time and Distance, Algebra, Profit and Loss, Powers and Exponents (Surds and Indices), Permutation and Combination
  2. General Awareness: Physics, Chemistry, Biology, History, Geography, Polity, Indian Economy, Environment, Static General Knowledge, GK- Current Affairs, Artificial Intelligence, MS Office Applications, Terms & Abbreviations, Keyboard Shortcuts, Evolution of Indian Banking (Banking & Financial Awareness), Emerging Tech Trends
  3. Engineering Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Linear Algebra, Calculus, Probability, Statistics, Signal Space and Optimum Detection, Probability, Statistics
  4. Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep, Number Systems and Codes, Registers and Counters, Boolean Algebra and Logic Gates, Microprocessors and Microcontrollers, Logic Families and CMOS Logic, Microprocessors, Logic Gates and Boolean Algebra, Minimization of Boolean Functions, Timing, Hazards and Testing, Logic Families, Combinational Logic Design, Arithmetic Circuits, Waveform Generators and Timer Circuits, Semiconductor Memories and Programmable Logic Devices, Combinational Logic Circuits, Latches and Flip-Flops, Finite State Machines, Sequential Circuits and State Machines, Minimization of Boolean Functions, Arithmetic Circuits, Latches and Flip-Flops, Number Systems and Codes, Registers and Counters
  5. Computer Organisation & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer, Register Transfer and Microoperations, Semiconductor Memories and Programmable Logic, Processor Organization and Instructions, Memory Hierarchy and Input/Output, Registers and Counters
  6. Programming & Data Structures: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, HTML Basics, OOPS with C++, Java, Object Oriented Technology
  7. Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization
  8. Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  9. Theory of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Security, Windows OS, Distributed Systems, Unix OS, Linux OS
  12. Computer Networks: Introduction to CN, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware Basics, Data Communication, Website, Browser & Services, Web Design & Development, Network Security, Cyber Threats and Malware Attacks, Cyber Safety and Security
  13. Full Length Mock Tests:
  14. Sectional Tests:
  15. Paper 2 - Full-length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment introduces the two mechanisms by which a node in distance vector routing disseminates its partial routing table to immediate neighbors: periodic updates and triggered updates. The instructor presents a slide titled around routing-table updates, opening with the question of when a node sends its partial routing table (only two columns) to all immediate neighbors. The answer given is that it is sent both periodically and on change. Under “Periodic Update,” the slide states that a node sends its routing table normally every 30 s, with the period depending on the protocol using distance vector routing. The instructor hand-draws a circle around “every 30 s” and underlines “in a periodic update” to emphasize the fixed interval. Under “Triggered Update,” the slide states that a node sends its two-column table to neighbors anytime there is a change in its routing table. Two sub-bullets identify the causes of such changes: receiving a new table from a neighbor (after updating) and detecting link failure, which results in a distance change to infinity. A hand-drawn diagram shows a central node connected to multiple neighbors with arrows indicating table exchange, illustrating the network topology for these updates. The segment is a single-slide conceptual explanation with no worked numerical example; the key takeaway is the contrast between time-driven (every 30 s) and event-driven (on change, including link failure to infinity) update triggers in distance vector routing.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces the slide on routing-table updates in distance vector routing, opening with the question of when a node sends its partial routing table (only two columns) to all immediate neighbors. The slide lists “Periodic Update” and “Triggered Update.” Visible text reads “A node sends its routing table, normally every 30 s, in a periodic update.” Around 65s the instructor hand-draws a circle around “every 30 s” and underlines “in a periodic update,” emphasizing the fixed interval. The presenter in a black KG polo explains that updates occur both periodically and on change, setting up the two update types.

  2. 2:00 – 4:30 02:00-04:30

    The instructor elaborates the two update mechanisms. The “Periodic Update” bullet states a node sends its routing table normally every 30 s, with the period depending on the protocol using distance vector routing. The “Triggered Update” bullet states a node sends its two-column table to neighbors anytime there is a change in its routing table, followed by sub-bullets: receiving a neighbor's table (after updating) and detecting link failure. The slide notes a triggered update “can result from the following” causes, including “a distance change to infinity.” A hand-drawn diagram shows a central node connected to multiple neighbors with arrows indicating table exchange, illustrating the topology. The segment concludes by contrasting time-driven periodic updates with event-driven triggered updates.

The core concept is that distance vector routing nodes propagate their partial (two-column) routing tables to immediate neighbors via two complementary triggers. Periodic updates are time-driven: a node sends its table normally every 30 s, though the exact period depends on the specific protocol. Triggered updates are event-driven: a node sends its table to neighbors immediately whenever there is a change in its routing table. Two causes of such changes are identified: (1) receiving a new table from a neighbor, which may prompt an update after the node updates its own table, and (2) detecting a link failure, which causes a distance to change to infinity. A hand-drawn diagram of a central node with arrows to multiple neighbors visualizes the table-exchange topology. The pedagogical emphasis, reinforced by circling “every 30 s” and underlining “in a periodic update,” is on distinguishing the fixed-interval mechanism from the change-triggered mechanism. No numerical worked example is shown; the lesson is conceptual, defining when and why updates are sent.

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