CIDR Practice Question_

Duration: 4 min

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Inside: a video lesson and guided study material.

Module outline

  1. Quantitative Aptitude: Ratio and Proportion (Ratios), Data Interpretation, Mixture and Alligation, Permutation and Combination, Number System, Sequence and Series (Series), Speed Time and Distance, Speed Mathematics and Basic Mathematics, Algebra, Percentage, Profit and Loss, Simple Interest and Compound Interest, Powers and Exponents (Surds and Indices), Time and Work, Mensuration and Geometry, Partnership
  2. Reasoning Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Seating Arrangements, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Directions (Direction Test), Ranking, Order and Sequence, Syllogisms, Blood Relations, Puzzle Solving (Puzzles), Inequality, Machine Input-Output
  3. English Language: Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, 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), Sentence Construction, Pronoun, Preposition, Conjunction, Adverb, Verb, Modals, Articles, Determiner, Interjection
  4. General Awareness: Evolution of Indian Banking (Banking & Financial Awareness), GK- Current Affairs, Static General Knowledge, Indian Economy
  5. C Concepts + MCQs (IT Specialist): C Programming by Yash Sir, C Language Core
  6. Java (IT Specialist): Java
  7. Python (IT Specialist): Python for Placements by Yash Sir, Python Basics
  8. OOPs (IT Specialist): Object Oriented Programming (OOPS)
  9. DBMS (IT Specialist): 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
  10. SQL (IT Specialist): SQL
  11. Software Engineering (IT Specialist): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  12. Data Structure (IT Specialist): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  13. Operating System (IT Specialist): 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
  14. Compiler Design (IT Specialist): 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
  15. Computer Architecture (IT Specialist): Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Multiprocessors, Programming the Basic Computer
  16. Data Communication & Networking (IT Specialist): 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
  17. Descriptive Test (Main Exam): English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video demonstrates IP subnetting techniques using a Class C network address. The instructor begins by solving a fixed-length subnetting problem where a /24 network is divided into four equal subnets. He explains the binary borrowing process and calculates the resulting subnet IDs and ranges. The lecture concludes by introducing a more complex Variable Length Subnet Masking (VLSM) scenario requiring unequal subnet sizes.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor presents the problem: "Consider we have a big single network having IP Address 200.1.2.0/24 We want to do subnetting and divide this network into 4 subnets." He draws a large circle to visualize the address space. He identifies the network portion as the first three octets (200.1.2) and notes the last octet has "8 bit" available for hosts. To create 4 subnets, he explains that 2 bits must be borrowed from the host portion because 2^2 equals 4. He writes the binary combinations "00, 01, 10, 11" to represent the new subnet bits. He then begins listing the resulting subnet IDs, starting with "200.1.2.0 /26", indicating the new mask length.

  2. 2:00 – 3:34 02:00-03:34

    The instructor continues the calculation, determining the block size. Since 2 bits were borrowed, 6 bits remain for hosts (8-2=6), resulting in a block size of 2^6 = 64. He lists the four subnets: 200.1.2.0/26, 200.1.2.64/26, 200.1.2.128/26, and 200.1.2.192/26. A detailed slide appears showing the "1st Subnet" through "4th Subnet" with specific details like "Direct Broadcast Address" and "Range of IP Addresses". For example, the 1st subnet range is "200.1.2.0, 200.1.2.63". The slide also calculates "Total number of hosts that can be configured = 64 - 2 = 62". Finally, a new question appears on screen: "We want to do subnetting network into 3 subnets, such that first contains 126 hosts, and other two contains 62 hosts each?" signaling a shift to VLSM.

The lesson effectively bridges basic subnetting concepts with more advanced VLSM applications. By first establishing a clear, equal division of a network, the instructor builds a strong foundation for understanding how bit borrowing affects address ranges and block sizes. The transition to the final problem highlights the practical necessity of VLSM when network requirements are not uniform, preparing students for complex network design scenarios where efficiency is key.

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