Network Security Fundamentals And Concepts | UHD 2024 |

At its core, refers to the policies, practices, and technologies designed to protect the integrity, confidentiality, and accessibility of computer networks and data. It is a broad umbrella that encompasses both hardware and software solutions, as well as rules and regulations governing user behavior.

| Category | Examples | |----------|----------| | Firewall | pfSense, iptables, Cisco ASA, Palo Alto | | IDS/IPS | Snort, Suricata, Zeek (formerly Bro) | | VPN | OpenVPN, WireGuard, StrongSwan | | SIEM | Splunk, ELK Stack (Elasticsearch, Logstash, Kibana), Wazuh | | NAC | PacketFence, Cisco ISE | | Scanning | Nmap, Wireshark, Metasploit | Network Security Fundamentals and Concepts

| Threat | Description | |--------|-------------| | | Viruses, worms, ransomware, trojans. | | Phishing | Deceptive messages to steal credentials or deliver malware. | | Man-in-the-Middle (MitM) | Intercepting or altering communication between two parties. | | Denial-of-Service (DoS/DDoS) | Overwhelming a resource to make it unavailable. | | Insider Threats | Malicious or negligent actions by employees or contractors. | | Advanced Persistent Threats (APTs) | Long-term, targeted intrusions often sponsored by nation-states. | | Zero-day exploits | Attacks on unknown vulnerabilities before a patch exists. | At its core, refers to the policies, practices,

Confidentiality ensures that sensitive information is accessed only by authorized individuals. It is the concept of privacy. In network security, this is achieved through encryption protocols (like IPsec or SSL/TLS) and strict Access Control Lists (ACLs). A breach of confidentiality occurs when data is leaked, intercepted, or viewed by unauthorized parties. | | Phishing | Deceptive messages to steal