Looking for comprehensive PGDCA (Post Graduate Diploma in Computer Applications) notes on Cyber Security for the 2026–27 academic session? Access complete theory explanations, short notes, long analytical answers, objective MCQs, and exam-oriented solutions covering fundamental security principles (CIA Triad), types of cyber threats & malware (Viruses, Worms, Trojans, Ransomware, Phishing), Cryptography (Symmetric vs. Asymmetric encryption), Firewalls, IDS/IPS, Digital Signatures, Cyber Law & IT Act provisions, and network security mechanisms tailored for university diploma exams.
Cyber Security
As financial and personal activities move online, securing digital assets is critical.
Definition for Exam:
Cyber Security is the practice of protecting computer systems, networks, programs, and digital data from malicious cyberattacks, damage, or unauthorized access.
The CIA Triad Security Model:
- Confidentiality: Ensuring data is accessible only to authorized users.
- Integrity: Ensuring data is accurate, complete, and protected against unauthorized tampering.
- Availability: Ensuring network resources remain available to users whenever needed.
PGDCA Cyber Security Notes
2-Mark Questions
Q1. Define Cyber Security.
Answer: Cyber Security is the practice of protecting digital devices, networks, programs, and sensitive electronic data from unauthorized access, cyberattacks, damage, or theft.
Q2. Differentiate between a Virus and a Trojan Horse.
Answer: A Virus is malicious code that attaches to host execution files and self-replicates across files. A Trojan Horse disguises itself as legitimate utility software while executing malicious tasks in the background without self-replicating.
PGDCA Malware and Firewalls Important Questions 2026-27
3-Mark Questions
Q3. Explain the CIA Triad model in Cyber Security.
Answer:
- Confidentiality: Ensures sensitive data is accessible only to authorized users through encryption and authentication controls.
- Integrity: Guarantees that data remains accurate, complete, and protected against unauthorized modification during storage or transfer.
- Availability: Ensures information systems, networks, and applications remain accessible and operational for authorized users when needed.
Cyber Security PGDCA Syllabus Question Answer
🛡️ PGDCA Exam Preparation Notice: This page provides curated PGDCA (Post Graduate Diploma in Computer Applications) Cyber Security Study Material & Solutions updated for the 2026–27 academic session. This complete guide features threat classification diagrams, CIA Triad breakdowns, symmetric vs. asymmetric cryptography comparison tables, firewall architecture, and high-yield exam questions designed to help you secure top marks in your semester examinations.
💡 Master PGDCA Security & Information Systems Concepts:
- Need clarification on the CIA Triad, public/private key encryption, or IT Act sections in Cyber Security? Drop your query in the comments section below!
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