To defend a network, you must understand the threats it faces. Threats can be categorized by their origin, motivation, and method. Common categories include:
: Ensuring reliable and timely access to network resources. This involves protecting against denial-of-service (DoS) attacks and using redundant architectures to maintain uptime. Primary Security Controls Network Security Fundamentals and Concepts
A layered approach: physical, network, host, application, and data security. If one layer fails, others remain. To defend a network, you must understand the
: Ensuring that sensitive information is only accessible to authorized users. Common tools include encryption and strong access controls. To defend a network
. It involves multiple layers of defense—including physical, technical, and administrative controls—to ensure the network remains reliable and secure. Core Principles: The CIA Triad At the heart of network security is the