Hierarchical Name Space

Duration: 4 min

This video lesson is available to enrolled students.

Return to /learn/SSC-JE-IMD-SCIENTIFIC-ASSISTANT-COMPUTER-SCIENCE/computer-networks/application-layer/ftp-dns-telnet/asset-hierarchical-name-space after enrolling

Inside: a video lesson and guided study material.

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 hierarchical name spaces as a solution to the limitations of flat naming in large systems. It begins by defining namespaces and explaining why unique names are required for unambiguous addressing, then critiques flat name spaces as unsuitable for large-scale systems like the Internet. The instructor transitions to hierarchical naming, using a whiteboard example such as IITD/CS/ITSENS to show structured naming. The lesson then presents a hierarchical name space tree with generic and country-based domains, including examples like com, edu, gov, org, net, jp, us, and nl. A domain name space slide explains the inverted-tree structure with a root at level 0 and up to 128 levels. The final section defines labels as strings of at most 63 characters, with the root label being null, and explains that full domain names are sequences of labels separated by dots, read from the node up to the root. A worked tree example shows edu., fida.edu., atc.fida.edu., and challenger.atc.fida.edu. as domain names derived from the hierarchy.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The lecture opens with a slide titled NAME SPACE stating that names must be unique because addresses are unique. It explains flat name spaces, where a name is assigned to an address and described as a sequence of characters without structure. The slide notes the main disadvantage: flat name spaces cannot be used in large systems such as the Internet, and concludes with the solution being a hierarchical name space. The instructor writes on the board, first showing WWW IITD in and then building a hierarchical example reading IITD/CS / IT SE NS, illustrating how structured names can represent organizational hierarchy.

  2. 2:00 – 3:55 02:00-03:55

    The lesson moves to a slide titled Hierarchical Name Space, showing that each name is made of several parts. A tree diagram displays generic and country-based domains such as int, com, edu, gov, mil, org, net, jp, us, and nl, with child nodes like sun, yale (cs, eng), acm, ieee (jack, jill), keio, and nec. A DOMAIN NAME SPACE slide explains that names are defined in an inverted-tree structure with the root at top and only 128 levels, from level 0 to level 127. A table pairs labels with descriptions, including com for commercial organizations, edu for educational institutions, and gov for government institutions. The final slide defines each node's label as a string of at most 63 characters, with the root label being null. It explains that a full domain name is a sequence of labels separated by dots, read from the node up to the root. A tree example shows nodes edu, fida, atc, and challenger branching from Root, with corresponding domain names edu., fida.edu., atc.fida.edu., and challenger.atc.fida.edu.

The lecture progresses from the problem of flat name spaces to the solution of hierarchical naming. It establishes that unique names are necessary for unambiguous addressing, then demonstrates why flat structures fail in large systems. The instructor uses a whiteboard example to introduce hierarchical naming, followed by slides that formalize the concept with tree diagrams and domain examples. Key concepts include generic versus country-based domains, the inverted-tree structure of the domain name space with 128 levels, and the definition of labels as strings up to 63 characters. The worked example of challenger.atc.fida.edu. demonstrates how domain names are constructed by reading labels from a node up to the root, separated by dots. This provides students with both conceptual understanding and practical notation for hierarchical naming systems.

Loading lesson…