Token Passing - Controlled Access Protocol

Duration: 4 min

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Module outline

  1. Quantitative Aptitude: Number System, Divisibility Rules, HCF LCM, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Partnership, Age Problems, Time and Work, Pipe and Cistern, Speed Time and Distance, Algebra, Arithmetic, Data Interpretation, Sequence and Series (Series), Logarithm, Powers and Exponents (Surds and Indices), Permutation and Combination, Probability, Speed Mathematics and Basic Mathematics, Trigonometry
  2. Logical Reasoning: Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Seating Arrangements, Puzzle Solving (Puzzles), Data Arrangement, Syllogisms, Inequality, Data Sufficiency, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Series (Number and Letter Series) (Numerical Relations and Reasoning), Venn Diagram, Logical Sequence Of Words, Calendar, Clock, Cubes & Dices, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning)
  3. Verbal Ability: Noun, Pronoun, Adjectives, Verb, Adverb, Tenses, Subject Verb Agreement (Verb Noun Agreement), Articles, Preposition, Conjunction, Modals, Determiner, Vocabulary, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Construction
  4. Data Structures (Domain Test): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  5. Algorithms (Domain Test):
  6. OOPs (Domain Test): Object Oriented Programming (OOPS)
  7. DBMS (Domain Test): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, ORDBMS, Database Security & Authorization, Query Processing & Optimization, Enhanced Data Models, Data Warehousing & Mining, Big Data Systems, NoSQL
  8. SQL (Domain Test): SQL
  9. Operating Systems (Domain Test): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  10. Computer Networks (Domain Test): Introduction to CN, Data Communication, 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, Network Security, Cloud Computing and IoT, Cyber and Info Security
  11. Coding: Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir
  12. Written English Test: English Writing Ability
  13. Psychometric Test: Behavioral Assessment (Behavioral Competency Profiling) (Psychometric Test)
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces Token Passing as a controlled access protocol where network stations are organized in a logical ring structure. The instructor explains that each station has a predecessor and successor, with access rights passed sequentially after data transmission. Visual aids display four distinct network topologies: Physical ring, Dual ring, Bus ring, and Star ring. A special packet called a token circulates through the ring, granting the holder the right to access the channel and send data. When a station finishes transmitting or has no more data, it releases the token for the next successor in the sequence. The diagrams illustrate how data flows between numbered stations across different physical layouts, emphasizing that logical ring organization can exist on various physical configurations.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The lecture begins by defining Token Passing as a controlled access protocol where stations form a logical ring. The instructor explains predecessor and successor relationships, noting that access rights transfer after data transmission. Visual aids show four topologies labeled a through d: Physical ring, Dual ring, Bus ring, and Star ring. The presenter gestures toward diagrams while explaining how the token circulates through the network structure.

  2. 2:00 – 4:10 02:00-04:10

    The instructor elaborates on token circulation mechanics, stating that a special packet called a token grants channel access rights. The slide text reads: "In this method, a special packet called a token circulates through the ring." Diagrams illustrate data flow paths between numbered stations. The speaker points to each topology diagram while explaining how the token moves from one station to its successor, ensuring orderly access without collisions.

Token Passing operates as a controlled access protocol where network stations are logically arranged in a ring, regardless of their physical layout. The core mechanism involves circulating a token—a special packet that grants transmission rights—to each station in sequence. Stations must wait for the token before sending data, preventing collisions and ensuring fair access. The lecture demonstrates that this logical ring can be implemented across four physical topologies: Physical ring, Dual ring, Bus ring, and Star ring. Each topology maintains the logical predecessor-successor relationship essential for token circulation.

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