RARP - Reverse Address Resolution Protocol

Duration: 3 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:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces the Reverse Address Resolution Protocol (RARP), explaining how a diskless machine that knows only its physical hardware address can discover its logical IP address. The instructor presents a slide defining RARP as the protocol that finds the logical address for a machine knowing only its physical address. The teaching flow moves from conceptual motivation—hosts and routers are assigned unique logical IP addresses independent of physical hardware, and normally the IP is read from a disk configuration file—to the special case where a diskless machine boots from ROM and must obtain its IP via RARP. The second half of the video focuses on a two-part diagram illustrating the request/reply exchange: part (a) shows the RARP request being broadcast on the local network, with a yellow callout stating “My physical address is A4:6E:A5:57:82:36. I am looking for my IP address,” and part (b) shows the RARP reply being sent as a unicast from the server back to the host, with the callout “Your IP address is 141.14.56.21.” The instructor emphasizes that the requesting machine runs a RARP client while the responding machine runs a RARP server, and uses gestures to highlight the host icon and the broadcast/unicast distinction. The lesson is concise, centered on one slide set with a supporting diagram.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor presents a slide titled “RARP” defining the Reverse Address Resolution Protocol as finding the logical address for a machine that knows only its physical address. On-screen bullets explain that each host or router is assigned one or more logical (IP) addresses unique and independent of the physical hardware address, that an IP is usually read from a disk configuration file, but that a diskless machine boots from ROM and can only get its physical address by reading its NIC. The instructor gestures toward the slide to emphasize the relationship between physical and logical addresses, setting up why RARP is needed for diskless booting.

  2. 2:00 – 3:28 02:00-03:28

    The slide shifts to the RARP exchange with two bullets stating that a RARP request is broadcast on the local network and that the requesting machine runs a RARP client while the responder runs a RARP server. Diagram “a. RARP request is broadcast” shows a Host sending a Request toward a RARP server, with a yellow note reading “My physical address is A4:6E:A5:57:82:36. I am looking for my IP address.” Diagram “b. RARP reply is unicast” shows a Reply arrow from the server back to the Host, with the note “Your IP address is 141.14.56.21.” The instructor enters, draws an oval around the Host icon, and points to it with a pen, reinforcing the client/server roles and the broadcast request versus unicast reply.

The core concept is that RARP reverses the usual ARP direction: given a known physical (MAC) address, it discovers the corresponding logical IP address. The lecture first motivates this by contrasting normal disk-based IP configuration with a diskless machine that boots from ROM and can only read its NIC’s physical address. It then demonstrates the protocol operation through a two-part diagram: the client broadcasts a request containing its physical address, and a RARP server on the local network replies with the mapped IP address using unicast. Key takeaways for revision are: (1) RARP maps physical to logical address; (2) the request is broadcast, while the reply is unicast; (3) the requester runs a RARP client and the responder runs a RARP server. The concrete example uses physical address A4:6E:A5:57:82:36 and IP 141.14.56.21, which students should recall as the canonical illustration of the exchange.

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