Firewalls, VPNs and intrusion detection protect networks.
Network defences: firewalls, VPNs, intrusion detection/prevention, segmentation, secure protocols (SSH, TLS), strong authentication and patching. Threats: eavesdropping, spoofing, DoS, man-in-the-middle, malware. Principle of defence in depth.
A firewall blocks inbound traffic except ports 80 and 443.
Network security protects data and services from attackers, so firewalls and monitoring are core parts of any connected system.
Firewalls, VPNs and intrusion detection protect networks.
Network security protects data and services from attackers, so firewalls and monitoring are core parts of any connected system.
It filters traffic according to rules, such as allowing only specific ports and addresses, which limits what can reach a system.
No. A VPN protects the link, but the endpoints still need patching, authentication and monitoring.
Typical applications include blocking unexpected incoming connections to an industrial controller with a firewall, connecting remote staff to an office through a VPN and detecting unusual traffic patterns with an intrusion detection system.
Study "HTTP and HTTPS" first (topic 70 of 104 in Software & Computing). It covers the groundwork this topic builds on.
Zero trust. DMZ. Wireless security WPA3.
A firewall blocks inbound traffic except ports 80 and 443.
The next topic is "Wireless networking", which builds directly on this one.
It is classed as Advanced in Software & Computing (topic 71 of 104). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Software & Computing.
Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.