BCA Semester 5 – Computer Networking – Unit 7: Network Security (5Hrs)

a) DNS (Domain Name System) Definition: DNS is a hierarchical system that translates human-readable domain names (like www.example.com) into IP addresses required for network communication. Key Po

1. Digital Signature Definition: A digital signature is a cryptographic technique used to verify the authenticity and integrity of a digital message or document. - Provides authentication, integri

1. Why DNS is Needed Reasons: 1. Human-Friendly Names: - Domain names like www.tribhuvan-university.edu.np are easier to remember than numeric IP addresses like 103.69.124.1. 2. Dynamic IP

1. DNS (Domain Name System) Definition: DNS is a hierarchical and distributed system that translates human-readable domain names (e.g., www.example.com) into IP addresses (e.g., 192.168.1.1) require

1. Cryptography Definition: Cryptography is the science of securing information by transforming it into an unreadable format to prevent unauthorized access. - Ensures confidentiality, integrity, a

1. RSA (Rivest-Shamir-Adleman) Definition: RSA is an asymmetric cryptographic algorithm used for secure data transmission. - Uses public key for encryption and private key for decryption. Key Po