Network Security
15 terms in this topic area.
Air Gap
An air gap physically isolates a system from other networks. See how it works and where it is used: IT security, power transmission and manufacturing.
DDoS
A DDoS attack floods systems with traffic until they fail. See how it works and how to shield your business from outages and financial losses.
Deep Packet Inspection (DPI)
Deep Packet Inspection (DPI) examines the content of network packets. See how it works, its pros and cons, and where it is used.
Demilitarized Zone (DMZ)
What is a DMZ? A demilitarized zone separates public servers from the internal network. Design with one or two firewalls, examples and router DMZ explained.
DNS Security
DNS security protects name resolution from attacks such as DNS spoofing and cache poisoning. See how measures like DNSSEC protect your networks.
Firewall
A firewall filters network traffic and is key to network security. See how it works and what matters when you deploy and maintain it.
Intrusion Detection System (IDS)
An intrusion detection system (IDS) detects attacks and unauthorized access in networks. See how it works and which types exist.
Intrusion Prevention System (IPS)
An intrusion prevention system (IPS) detects and blocks attacks. See what it is, how it works, its benefits and where it is used.
Man-in-the-Middle (MITM)
A man-in-the-middle (MITM) attack intercepts communication between two parties. See how it works, attack methods and how to protect your data.
Network Access Control (NAC)
What is network access control (NAC)? How it works, 802.1X and RADIUS, adaptive NAC, how it differs from a firewall and ZTNA, and a rollout in five steps.
Network Segmentation
Network segmentation splits a network into separate zones. See how it works, its benefits and how to use VLANs, subnets, SDN, firewalls and zero trust.
Rogue Access Point
A rogue access point is an unauthorized wireless access point. See how it works, why it is a serious threat and how to detect and stop it.
SSL/TLS
What is SSL/TLS? The protocol encrypts internet connections, for example with HTTPS. Handshake, certificates, versions and differences simply explained.
Transport Layer Security (TLS/SSL)
Transport Layer Security (TLS/SSL) is the key technology for sending data securely over the internet. Here is what you need to know.
VPN
A VPN (Virtual Private Network) encrypts data traffic through a secure tunnel. See how it works, how businesses use it and its limits.