Class B

Duration: 6 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the course: About the Course
  2. Mathematical Aptitude: संख्या पद्धति / Number System, महत्तम समापवर्तक और लघुत्तम समापवर्त्य / HCF and LCM, Divisibility Rules, प्रतिशत / Percentage, अनुपात और समानुपात / Ratio and Proportion, औसत / Average, लाभ, हानि और बट्टा / Profit, Loss and Discount, समय और कार्य / Time and Work, घन क्षेत्रमिति / Solid Mensuration, साधारण और चक्रवृद्धि ब्याज / Simple and Compound Interest, समय, चाल और दूरी / Time, Speed and Distance, Age Problems, मिश्रण और एलिगेशन / Mixture and Alligation, Algebra, सरलीकरण, घातांक और करणी / Simplification, Indices and Surds, Pipe and Cistern, Trigonometry, Statistics, आँकड़ा निर्वचन / Data Interpretation, Arithmetic, समुच्चय, संबंध, फलन और विविक्त गणित / Sets, Relations, Functions and Discrete Mathematics, संख्या पद्धति और संख्या सिद्धांत / Number Systems and Number Theory, निर्देशांक ज्यामिति, सदिश और त्रिविमीय ज्यामिति / Coordinate Geometry, Vectors and 3D Geometry, बहुपद, समीकरण और सम्मिश्र संख्याएँ / Polynomials, Equations and Complex Numbers
  3. Logical Reasoning: श्रेणी / Series, कूट लेखन एवं कूट वाचन / Coding-Decoding, सादृश्यता एवं वर्गीकरण / Analogy and Classification, रक्त संबंध / Blood Relations, दिशा एवं दूरी / Direction and Distance, क्रम एवं रैंकिंग / Order and Ranking, अशाब्दिक तर्क / Non-Verbal Reasoning, बैठक व्यवस्था एवं पहेलियाँ / Seating Arrangement and Puzzles, Syllogisms, वेन आरेख, न्याय वाक्य एवं असमानता / Venn Diagrams, Syllogism and Inequalities, गणितीय संक्रियाएँ एवं लुप्त संख्या / Mathematical Operations and Missing Numbers, वर्णमाला एवं संख्या परीक्षण / Alphabet and Number Test, कथन आधारित तार्किक विवेचन / Statement-Based Reasoning, Analytical Reasoning (Counting Figures Reasoning), घन, पासा एवं आकृतियों की गिनती / Cubes, Dice and Figure Counting, कैलेंडर एवं घड़ी / Calendar and Clock, Clock
  4. General Knowledge: वैज्ञानिक उपलब्धियाँ और अनुसंधान / Scientific Achievements and Research, Chemistry, Biology, History, Geography, Polity, Indian Economy, समसामयिकी / Current Affairs, Static General Knowledge, राज्य विशेष सामान्य ज्ञान / State-Specific General Knowledge
  5. Art of Teaching: शिक्षण-अधिगम प्रक्रिया एवं कक्षा प्रबंधन / Teaching-Learning Process and Classroom Management, Learners & Learning Process, Factors Affecting Teaching, शिक्षण विधियाँ एवं उपागम / Teaching Methods and Approaches, सूक्ष्म शिक्षण एवं कक्षा संप्रेषण / Microteaching and Classroom Communication, शिक्षण सहायक सामग्री एवं शैक्षिक तकनीकी / Teaching Aids and Educational Technology, आकलन एवं मूल्यांकन / Assessment and Evaluation, शिक्षक: गुण, व्यावसायिक नैतिकता एवं विकास / Teacher: Qualities, Professional Ethics and Development, शैक्षिक नीतियाँ, अधिनियम एवं प्रशासन / Educational Policies, Acts and Administration, पाठ्यचर्या, कला एवं सह-शैक्षिक क्षेत्र / Curriculum, Arts and Co-curricular Areas, निर्देशन एवं परामर्श / Guidance and Counselling, दिव्यांग बच्चों की शिक्षा / Education of Children with Disabilities, Micro-Teaching & Teaching Skills, पाठ योजना / Lesson Planning
  6. Environmental Science: Environment
  7. Unit 1 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  8. Unit 2 | COA: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer
  9. Unit 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  10. Unit 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  11. Unit 4 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  12. Unit 5 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management
  13. Unit 6 | Database Management System: 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
  14. Unit 7 | Computer Networks: 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
  15. Unit 8 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  16. Unit 9 | Object Oriented Programming: OOPS with C++
  17. Unit 10 | Web Development: HTML Basics, CSS, JavaScript-Basics, XML, Node.js, Git & Github, PHP
  18. Unit 11 | 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
  19. Unit 12 | IoT: Emerging Tech Trends, Cloud Computing, कंप्यूटर नेटवर्क / Computer Networks, Internet of Things
  20. Unit 13 | Artificial Intelligence: Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms
  21. Unit 14 | E-Commerce: Electronic Data Interchange and E-Commerce, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Physical Security and Cryptography Basics, Cyber Safety and Security
  22. Unit 15 | Multimedia: Multimedia
  23. Unit 16 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  24. Full Length Mock Tests — General Paper:
  25. Full Length Mock Tests — Computer Science (Paper II):
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment introduces Class B IP addressing within the context of classful IPv4 networks. The instructor presents a slide titled “Class B” stating that in Class B, NetID = 16 bits and HostID = 16 bits. The first two bits are reserved as “10” in binary, which fixes the range of the first octet to [128, 191] in dotted decimal notation. The slide also gives the total number of networks available in Class B as 2^14 (16,384) and the total number of hosts that can be configured in every network as 2^16 − 2 (65,534). A comparison table at the bottom of the slide lists Class Prefixes and First byte ranges for Classes A through E, with Class B shown as 128 to 191. The instructor uses hand-drawn circles and arrows to highlight the key values 2^14 (16,384) and 2^16 − 2 (65,534), linking them to a small sketch on the right. Earlier in the segment, a transition from Class A is visible, where NetID = 8 bits and HostID = 24 bits, first bit reserved as “0”, range [0, 127], and reserved addresses such as 0.0.0.0 for broadcasting and 127.0.0.1 for loopback are mentioned.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens on a “Class B” slide listing NetID = 16 bits and HostID = 16, the binary prefix “10”, first octet range [128, 191], and totals of 2^30 networks and 2^14 hosts. A transition to a “Class A” slide is visible, showing NetID = 8 bits and HostID = 24, first bit “0”, range [0, 127], and reserved addresses 0.0.0.0 (broadcast) and 127.0.0.1 (loopback). A comparison table of Class Prefixes and First byte ranges appears at the bottom.

  2. 2:00 – 5:00 02:00-05:00

    The instructor returns to the “Class B” slide, emphasizing that NetID = 16 bits and HostID = 16, with the first two bits reserved as “10” in binary. The range of the 1st octet is [128, 191]. A hand-drawn oval circles the value (16,384) next to “Total number of networks available in class B is 2^14”. The instructor points with a pen at “Total number of hosts that can be configured in every network in class B is 2^16 − 2 (65,534)”. A bottom diagram shows four “8 bits” segments with Class A–E rows labeled Prefix/Suffix, beside a “Class Prefixes / First byte” table.

  3. 5:00 – 6:09 05:00-06:09

    The “Class B” slide remains on screen with red hand-drawn circles highlighting “2^14 (16,384)” and “2^16 − 2 (65,534)”, with arrows linking them to a small sketch on the right. The bottom-left diagram shows four “8 bits” segments and rows for Class A through E with shaded Prefix and Suffix blocks. The right-hand table headed “Class | Prefixes | First byte” lists B as n = 16 bits with first byte “128 to 191”. The instructor continues pointing at the key values while explaining.

The central teaching point is the structure and capacity of Class B IPv4 addresses. The instructor defines NetID as 16 bits and HostID as 16 bits, identifies the class by the binary prefix “10”, and derives the first octet range [128, 191]. The total number of networks is given as 2^14 (16,384), and the usable hosts per network as 2^16 − 2 (65,534), with the subtraction of two accounts for network and broadcast addresses. A comparison table across Classes A–E reinforces how prefix bits determine first-byte ranges. The instructor uses hand-drawn circles, arrows, and pen gestures to draw attention to the key numerical values. The segment also briefly references Class A (NetID 8, HostID 24, range [0,127], reserved addresses) to provide context before focusing on Class B. The visual aids include a 32-bit IP structure diagram with four 8-bit segments and shaded Prefix/Suffix blocks for each class.

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