Chapter 1
Networking Concepts
Course: Comptia Network N10 009 Practice Test
Subject: Comptia Network N10 009
Chapter: This Chapter Will Entail The Following Lessons
Network security ensures the confidentiality, integrity, and availability of data and systems. It involves implementing logical, physical, and procedural controls to mitigate risks and protect against evolving cyber threats. Below is an expanded explanation of critical concepts in network security:
Logical Security
Logical security focuses on protecting systems, networks, and data through non-physical mechanisms such as encryption, authentication, access control, and identity management. These security measures ensure that only authorized users can access sensitive information while preventing unauthorized breaches, data leaks, or cyberattacks.
1. Encryption
Encryption is a cryptographic process that transforms readable data (plaintext) into an unreadable format (ciphertext) to prevent unauthorized access. Only entities with the correct decryption key can restore the original data.
Types of Encryption:
- Symmetric Encryption: Uses the same key for encryption and decryption (e.g., AES, DES).
- Asymmetric Encryption: Uses a pair of keys—public and private (e.g., RSA, ECC).