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Computer Network Access Control: A Summary

• Network security ensures the prevention, detection, and monitoring of unauthorized access, modification, or denial of a computer network and its resources.
• Network administrators control the authorization of network access to data by users through a unique name and password.
• Network security covers various networks used for conducting transactions and communications among individuals, businesses, and government agencies.
• Network security is used by organizations, enterprises, and other types of institutions to secure and protect their networks.
• Network security starts with authentication, which may require one-factor, two-factor, or three-factor authentication.
• Firewalls enforce access policies to control what services network users can access.
• Anti-virus software, intrusion prevention systems (IPS), and anomaly-based intrusion detection systems help detect and inhibit malware.
• Communication between two hosts using a network may be encrypted to maintain security and privacy.
• Honeypots, decoy network-accessible resources, are deployed in a network as surveillance and early-warning tools to study attackers' methods.
• Honeynets are networks set up with intentional vulnerabilities to invite attacks and increase network security.
• Security management for networks varies from basic security for homes and small offices to advanced software and hardware for large businesses.
• Networks are subject to passive and active attacks, including denial-of-service attacks, distributed denial-of-service attacks, man-in-the-middle attacks, and phishing attacks.