Transmission Vs Propogation delay

Duration: 6 min

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Module outline

  1. Paper 1 | Reasoning Test: 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, Puzzle Solving (Puzzles), Venn Diagram, Analogy, Ranking, Order and Sequence, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Selection Decision Table (Decision Making), Logical Sequence Of Words, Cubes & Dices, Analytical Reasoning (Counting Figures Reasoning), Calendar, 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, Algebra, Logical Deduction and Induction, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Speed, Time and Distance, Traverse Surveying, Ratio and Proportion, Time and Work, Mensuration, Permutations and Combinations, Clocks and Calendars, Data Interpretation, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations, Data Sufficiency
  2. Paper 1 | Numerical Analysis: Number System, HCF LCM, Percentage, Ratio and Proportion (Ratios), Average, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Data Interpretation, Mental Ability, Arithmetic, Logarithm, Profit and Loss, Simple Interest and Compound Interest, Speed Time and Distance, Mixture and Alligation, 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, Graph Theory, Combinatorics
  3. Paper 1 | General Knowledge: State Wise GK, History, Geography, GK- Current Affairs, Static General Knowledge, Polity, Indian Economy
  4. Paper 1 | DBMS: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Transaction Management, Concurrency Control, Relational Calculus, Database Security & Authorization, Database Recovery
  5. Paper 1 | Data Communication & Network: 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, Network Security, Security in Mobile and Wireless Computing, Input Output Organisation, File Management, Hardware Basics, Terms & Abbreviations, Protocols & Services, Network Access Technologies, Cyber Safety and Security, Basics of COA
  6. Paper 2 | System Analysis & Design: Fundamentals of Systems and Information Systems, SDLC and Development Approaches, Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Security, Risk Management & Maintenance, extras
  7. Paper 2 | Programming Language (Java): Java Fundamentals, OOPS with Java, Array, String, IO & References, Generic & Collections, Multithreading, Java, Miscellaneous, Control Flow, OOPS with C++, Stack, C Fundamentals, Arrays & Pointers, Object Oriented Technology, Control Flow & Looping, Introduction to Python
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video provides a detailed explanation of two fundamental types of network latency: transmission delay and propagation delay. The lecture begins by introducing transmission delay, defined as the time required to push all the bits of a packet onto the transmission link, and presents the formula: Transmission Delay = Data Size (bits) / Bandwidth (bps). The instructor then transitions to propagation delay, defined as the time it takes for a single bit to travel from the sender to the receiver through the physical medium, with the formula: Propagation Delay = Distance (m) / Propagation Speed (m/s). The video includes a worked example for propagation delay, using a distance of 4800 km and a signal speed of 2x10^8 m/s, which results in a delay of 24 milliseconds. The instructor also provides a worked example for transmission delay, calculating the delay for a 14-byte packet over a 100 Mbps link, resulting in 1.12 microseconds. The presentation uses a digital whiteboard with clear diagrams and step-by-step calculations to illustrate the concepts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a slide titled 'Transmission & Propagation Delay' which introduces the two main types of latency. The first concept, 'Transmission Delay,' is defined as the time required to push the entire packet onto the link, depending on packet size and bandwidth. The formula is explicitly written as 'Transmission Delay = Data Size (bits) / Bandwidth (bps)'. The instructor, visible in the bottom right, begins to explain this concept, setting the stage for the detailed calculations to follow.

  2. 2:00 – 5:00 02:00-05:00

    The focus shifts to 'Propagation Delay,' with a new slide presenting its definition: the time for one bit to travel from sender to receiver, depending on distance and signal speed. The formula 'Propagation Delay = Distance (m) / Propagation Speed (m/s)' is displayed. The instructor draws a diagram showing a signal traveling from point A to point B, labeling the distance as 4800 km. He then substitutes the values into the formula, writing 'T = D / S' and then 'T = 4800 x 10^3 / 2 x 10^8', which he calculates to be 24 milliseconds. This example demonstrates how to compute the propagation delay for a given distance and signal speed.

  3. 5:00 – 5:59 05:00-05:59

    The video returns to the topic of transmission delay with a new example. The instructor writes the formula 'Tt = Ttn = Data Size (bits) / Bandwidth (bps)'. He then provides a specific case: a data size of 14 bytes (which he converts to 14 x 8 = 112 bits) and a bandwidth of 100 Mbps (100 x 10^6 bps). He performs the calculation, writing 'Tt = 112 / 100 x 10^6', which simplifies to 1.12 x 10^-6 seconds, or 1.12 microseconds. This example illustrates how to calculate transmission delay for a small packet on a high-speed link.

The video systematically explains the two primary components of network latency. It first defines transmission delay as the time to transmit all bits of a packet, using the formula based on data size and bandwidth. It then defines propagation delay as the time for a bit to travel the physical distance, using the formula based on distance and signal speed. The lecture effectively uses two distinct, step-by-step worked examples—one for propagation delay and one for transmission delay—to demonstrate the application of the formulas and highlight the significant difference in magnitude between the two types of delay, with propagation delay being in milliseconds and transmission delay in microseconds.

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