DCA6303 CYBER SECURITY ESSENTIALS JAN FEB 2026

Description

SESSION	FEB-MARCH 2026
PROGRAM	MASTER OF COMPUTER APPLICATIONS (MCA)
SEMESTER	II
COURSE CODE & NAME	DCA6303 CYBER SECURITY ESSENTIALS

 

 

Assignment Set – 1

 

Q.1. Define Cybersecurity Threat Actors and explain the characteristics of Hackers and Insiders. Analyze the motivations and attack methods of Nation States and Organized Criminal Groups with examples. (5+5 = 10 Marks)

Ans 1.

1. a) Cybersecurity Threat Actors: Hackers and Insiders

A cyber-security threat actor is anyone, group, or organization that deliberately compromises the integrity, confidentiality, or availability or integrity of systems for information. Understanding threat actor profiles is the key to designing efficient security measures.

Hackers attack technical flaws on networks, systems or even applications. Professionals who

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Q.2. Explain the concept and working of Firewalls in network security. Compare Intrusion Detection Systems (IDS) and Firewalls in terms of functionality and effectiveness. (5+5 = 10 Marks)

Ans 2.

1. a) Firewalls in Network Security

A firewall is a network security device or software which monitors and regulates incoming as well as outgoing traffic according to established security guidelines. It is a security device that acts as a wall between a secure internal network and external networks that are not trusted, such as the internet, applying access control rules by permitting or blocking traffic in accordance with predefined rules. Firewalls constitute the primary protection in any design and implementation of

 

Q.3. List and explain the phases of Incident Response. Evaluate the importance of Incident Response planning in minimizing cyber damage. (5+5 = 10 Marks)

Ans 3.

1. a) Phases of Incident Response

Incident Response is the standardized process of planning to detect, contain, and recovering from cybersecurity incidents. The NIST framework identifies six phases to guide organizations through effective incident management.

Preparedness involves forming the IR group, delineating roles and responsibilities, creating response playbooks, acquiring monitoring equipment, as well as conducting workshops and

 

Assignment Set – 2

 

Q.4. Explain Symmetric Encryption with its advantages and limitations. Describe Asymmetric Encryption and compare it with Symmetric Encryption. (5+5 = 10 Marks)

Ans 4.

1. a) Symmetric Encryption: Advantages and Limitations

Symmetric encryption makes use of a shared secret key, which is utilized for encrypting plaintext into ciphertext and decrypting plaintext. Both parties involved must hold the same secret key prior to any secure exchange is able to begin. The most commonly used algorithms are AES, 3DES, and ChaCha20. AES-256 is currently the most widely used industry standard in

 

Q.5. Explain the role of Artificial Intelligence in Cybersecurity. Analyze the advantages and challenges of using AI in Cybersecurity systems. (5+5 = 10 Marks)

Ans 5.

1. a) Role of Artificial Intelligence in Cybersecurity

Artificial Intelligence has become a revolutionary technology in cybersecurity, enabling organisations to identify, react to threats and stop them from happening at a scale and speed impossible by human analysts on their own. Traditional systems based on rules handle threats well, however they fail to tackle emerging, fast-changing pattern of attack. AI addresses this by learning using large data sets of security to identify patterns, predict threats, and automate

 

 

Q.6. Explain the concept of Quantum Cryptography and its significance in modern cybersecurity. Discuss the role of Threat Intelligence in proactive cyber defense. Analyze how organizations use it to prevent attacks. (5+5 = 10 Marks)

Ans 6.

1. a) Quantum Cryptography and Its Significance

Quantum cryptography uses principles from quantum mechanics to build digital systems with security assurances founded on physical laws than computational hardness assumptions. The most mature application has been Quantum Key Distribution (QKD) that allows two parties to share the same cryptographic key with a fundamental physical security aspect: any attempts to eavesdrop are automatically detected.

In the BB84 QKD protocol, the sender transmits photons which are quantum-stated and encode