SubNetting Example

Duration: 5 min

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Module outline

  1. HPSC Interview Preparation: Interview Preparation
  2. Python Language: 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
  3. Data Structure & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Sorting Algorithms, Minimum Spanning Trees, Time Complexity Analysis, Graph Theory, Shortest Path Algos
  4. Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  5. Computer System & Organisation: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer
  6. Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Transaction Management, Concurrency Control
  7. Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling
  8. Digital Logic & Circuits: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  9. Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Pushdown Automata & CFG, Turing Machines, Moore & Mealy Machines
  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. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Data Warehousing & Mining
  12. Introduction to Emerging Trends: Emerging Tech Trends
  13. Digital Society & Cyber Law: Society, Law & Ethics
  14. HPSC PGT Previous Year Paper:
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  16. Live Sessions: HPSC Live Sessions, EMRS TGT/PGT Live Class
  17. Full Mock Test:
  18. HPSC PGT - MOCK Test Series:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture demonstrates subnetting the network 200.1.2.0 into four subnets using a quadrant circle diagram. The instructor identifies the required subnet bits, calculates block sizes and host ranges in binary/decimal, and summarizes each subnet's address range and usable hosts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The slide states the problem: “Consider we have a big single network having IP Address 200.1.2.0. We want to do subnetting and divide this network into 4 subnets.” The instructor underlines “200.1.2.0” and “into 4 subnets,” then draws a large circle on the whiteboard, crossing it with vertical and horizontal lines to form four quadrants tagged 0–3. Above the circle, bit groups are marked “24,” “8,” and “2,” indicating the original /24 host portion is split into 2 subnet bits and 6 host bits. The first quadrant begins with “200.1.2.”

  2. 2:00 – 4:54 02:00-04:54

    The instructor fills the four quadrants with subnet calculations. Binary host patterns such as “0111 11” = 63 and “10 111 1” = 127/191 are written to find broadcast addresses. The formula “64 − 2 = 62” appears for usable hosts per subnet. Final quadrant labels “1st Subnet” through “4th Subnet” list ranges [200.1.2.0, 200.1.2.63], [200.1.2.64, 200.1.2.127], [200.1.2.128, 200.1.2.191], and [200.1.2.192, 200.1.2.255], with “Total number of IP Addresses = 2^6 = 64” and broadcast examples like “200.1.2.00111111 = 200.1.2.63.”

The lesson centers on dividing a /24 network into 4 subnets by borrowing 2 bits from the host field, leaving 6 host bits. The circle diagram maps subnet IDs to quadrants and supports binary-to-decimal conversion for block boundaries. Key results: 64 addresses per subnet, 62 usable hosts, and four contiguous ranges from .0 to .255. The method shown is a practical GATE-style subnetting workflow: identify bits, compute block size, derive broadcast addresses, and list valid host ranges.

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