TCP Header-Check Sum Field

Duration: 4 min

This video lesson is available to enrolled students.

Return to /learn/UP-LT-GRADE-ASSISTANT-TEACHER-2025/cs-08-computer-networks/transport-layer-services/tcp-header-fields/asset-tcp-header-check-sum-field after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. CS | 01 | Digital Logic and Circuits and Discrete Mathematical Structures: Digital Systems & Boolean Basics, Number System, Number Representation, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Permutation and Combination
  3. CS | 02 | Computer Organization and Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Multiprocessors
  4. CS | 03 | Data Structures and Algorithm: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Complexity Theory, Advanced Algorithms
  5. CS | 04 | Problem Solving through C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  6. CS | 05 | Object Oriented Techniques: Object Oriented Technology, Java
  7. CS | 06 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Unix OS
  8. CS | 07 | Database Management Systems: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, Query Processing & Optimization, File Organization & Indexing
  9. CS | 08 | 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, Hardware basics
  10. CS | 09 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  11. CS | 10 | Internet Technology, Web Design and Web Technology: Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, JavaScript-Basics, HTML Basics
  12. CS | 11 | System Analysis And Design: Fundamentals of Systems and Information Systems, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance
  13. CS | 12 | Information Security and Cyber Laws: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security
  14. CS | 13 | Computer Graphics: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing
  15. GS Paper | 01 | Indian and World Geography: Geography
  16. GS Paper | 02 | History: History
  17. GS Paper | 03 | Indian Economy & Social Development: Indian Economy
  18. GS Paper | 04 | General Science: Biology, Chemistry, वैज्ञानिक उपलब्धियाँ और अनुसंधान / Scientific Achievements and Research
  19. GS Paper | 05 | Elementary Maths: संख्या पद्धति / Number System, Divisibility Rules, महत्तम समापवर्तक और लघुत्तम समापवर्त्य / HCF and LCM, प्रतिशत / Percentage, लाभ, हानि और बट्टा / Profit, Loss and Discount, साधारण और चक्रवृद्धि ब्याज / Simple and Compound Interest, अनुपात और समानुपात / Ratio and Proportion, औसत / Average, समय और कार्य / Time and Work, समय, चाल और दूरी / Time, Speed and Distance, Algebra, घन क्षेत्रमिति / Solid Mensuration, आँकड़ा निर्वचन / Data Interpretation, Arithmetic, Statistics, Probability, Sequence and Series (Series), मिश्रण और एलिगेशन / Mixture and Alligation, Calculus, Trigonometry, Vectors, संख्या पद्धति और संख्या सिद्धांत / Number Systems and Number Theory, यूक्लिडीय ज्यामिति और क्षेत्रमिति / Euclidean Geometry and Mensuration, सांख्यिकी और प्रायिकता / Statistics and Probability, निर्देशांक ज्यामिति, सदिश और त्रिविमीय ज्यामिति / Coordinate Geometry, Vectors and 3D Geometry, बहुपद, समीकरण और सम्मिश्र संख्याएँ / Polynomials, Equations and Complex Numbers, समतल क्षेत्रमिति / Plane Mensuration, सरलीकरण, घातांक और करणी / Simplification, Indices and Surds, समुच्चय, संबंध, फलन और विविक्त गणित / Sets, Relations, Functions and Discrete Mathematics
  20. GS Paper | 06 | Indian Polity and Governance: Polity
  21. GS Paper | 07 | Current Events: समसामयिकी / Current Affairs
  22. UPLT Live Classes Notes: UPLT Live Classes
  23. UPLT Full Mock Tests Tier 1:
  24. UPLT Full Mock Tests Tier 2:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment focuses on the TCP Checksum field, explaining its 16-bit size and how it is calculated over both the pseudo-header and the entire TCP segment. The instructor uses a slide titled "Checksum" with bullet points stating that this 16-bit field contains the checksum and that for the TCP pseudo-header, the protocol field value is 6. Diagrams illustrate the Pseudo-Header (Source Address, Destination Address, Protocol, TCP Length) joined to the TCP Segment (TCP Header and TCP Data), with a caption emphasizing that the checksum is calculated over both components. The left side of the slide displays a TCP header table highlighting the Checksum row as 16 bits. The teaching progression moves from defining the field to demonstrating its calculation scope, ensuring students understand that the entire TCP segment including data is considered during checksum computation.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The slide titled "Checksum" introduces the 16-bit field with bullet points stating "This 16-bit field contains the checksum" and "For the TCP pseudo header, the value for the protocol field is 6." A right-hand diagram shows a Pseudo-Header block (Source Address, Dest. Address, Protocol, TCP Length) joined to a TCP Segment box containing the TCP Header and green TCP Data block. The caption reads "Checksum Calculated Over Pseudo Header and TCP Segment," while a lower diagram labels the 16-bit Checksum field inside the TCP header layout with an arrow spanning it.

  2. 2:00 – 3:53 02:00-03:53

    The instructor emphasizes that during TCP checksum calculation, the entire TCP segment and pseudo-header (IP) are considered. The slide continues to display the Pseudo-Header diagram with Source Address, Dest. Address, Protocol, and TCP Length fields next to the TCP Segment containing the highlighted Check-sum cell and TCP Data. The left-side TCP header table shows rows for Sequence number, Acknowledgement number, Window size, and the Checksum row labeled "16 bits" with an arrow pointing to it. The caption reiterates that the checksum is calculated over both the pseudo-header and TCP segment.

The core concept taught is that the TCP Checksum field is 16 bits wide and its calculation encompasses both the pseudo-header (containing source/destination addresses, protocol value 6, and TCP length) and the complete TCP segment including header and data. The visual diagrams consistently reinforce this scope, with the protocol field value of 6 specifically identifying TCP within the pseudo-header. Students should remember that unlike some other protocols, TCP checksum calculation includes the data portion of the segment, not just the header. The repeated emphasis on the 16-bit size and the dual-component calculation scope (pseudo-header plus segment) forms the essential exam-relevant knowledge from this segment.

Loading lesson…