🌐 Protocol-Driven • 8 PYQ Papers Analysed

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in Computer Networks

21CSC302J · SRM IST · Semester 5
Computer Networks — Complete Smart Study Hub

5
Units Covered
8
PYQs Analysed
60+
Key Protocols
15
Must-Know Topics
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📚 Notes & Presentations

Unit-wise lecture notes, PPTs & study material synced from Google Drive

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🔥 Units 3 & 4 = 55% of marks.  IP Addressing & Subnetting, TCP vs UDP, Routing Algorithms (Dijkstra, Bellman-Ford), and DNS/HTTP appear in 7 out of 8 papers. Master these first! Subnetting numericals are guaranteed every year — practice VLSM & CIDR until it is automatic.
📈 Data-Driven Analysis

PYQ Pareto Analysis

Based on 8 exam papers. Master the 20% of topics that yield 80% of marks.

Unit 1
Intro & Data Link
18%
14 / 75 marks
Unit 2
MAC & LLC
17%
13 / 75 marks
🔥 HOT
Unit 3
Network Layer
30%
22 / 75 marks
🔥 HOT
Unit 4
Transport Layer
22%
16 / 75 marks
Unit 5
Application Layer
13%
10 / 75 marks

🏆 Top Topics — The Pareto List

Mastering only these topics lets you score 55–65 out of 75

🌡️ Topic Frequency Heatmap

📚 Complete Study Guide

Unit-by-Unit Study Guide

Clear protocol explanations, layered architecture diagrams, subnetting examples, and common exam traps for every unit.

⚡ Quick Reference

CN Formula & Protocol Cheat Sheet

Key formulas, subnetting rules, and protocol summaries. Click any card to highlight it.

🎯 Exam Strategy

Guaranteed Marks Plan

How to approach each part of the Computer Networks exam for maximum marks.

Part A
25 MCQs × 1 = 25 marks
Target: 20–23 / 25
  • OSI model — 7 layers, functions, PDU names 8/8
  • IP Addressing — Class A/B/C ranges, subnet mask 8/8
  • TCP vs UDP — connection, reliability, use-cases 8/8
  • Subnetting / CIDR notation numericals 7/8
  • Routing algorithms — Dijkstra, Bellman-Ford 7/8
  • Error detection — CRC, Hamming Code, Parity 7/8
  • ARP, RARP, ICMP, DHCP protocol functions 6/8
  • DNS resolution — iterative vs recursive query 6/8
  • HTTP vs HTTPS, FTP, SMTP, POP3, IMAP 6/8
  • MAC protocols — CSMA/CD, CSMA/CA, ALOHA 5/8
Part B
5 Questions × 8 = 40 marks
Target: 32–40 / 40
QUnitExpected Topic
21U1OSI vs TCP/IP model — compare all layers with protocols
22U2CRC calculation OR Hamming Code derivation (numerical)
23U3IP Subnetting VLSM numerical — divide network into subnets 🔥
24U3/U4Dijkstra/Bellman-Ford shortest path OR TCP handshake + flow control 🔥
25U5DNS resolution process OR HTTP request-response cycle
Part C
1 Question × 10 = 10 marks
Target: 8–10 / 10

Choose 1 of 2 questions. Typical options:

Q.26
Subnetting: given a Class B/C address, divide into N subnets using VLSM — show all subnet IDs, host ranges, broadcast addresses 🔥 OR Dijkstra's algorithm — step-by-step shortest path table for a 6-node graph
Q.27
TCP sliding window + congestion control (slow start, congestion avoidance, fast retransmit) OR Compare OSI and TCP/IP with protocol examples at each layer
💡 CN Exam Secret: For subnetting questions, always show your working — the hosts formula $2^n - 2$, subnet mask in dotted-decimal AND CIDR prefix, and a clear table with Network ID, First Host, Last Host, Broadcast. Examiners award step marks generously.

🔮 Predicted Next Exam Topics

Based on recent patterns

✏️ Practice Zone

Solved Questions & MCQ Drill

The most-repeated solved questions from 8 years of PYQs, plus MCQ flashcards.

🃏 MCQ Flashcards — Active Recall Drill

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✅ Correct: 0
❌ Wrong: 0
📊 Total: 0

✅ Final Revision Checklist

📜 Past Year Papers

Solved PYQs

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