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Network security
Explore firewalls, VPNs, access controls and practical defensive techniques.
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Featured articles
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Network Switches Explained — How Ethernet Switching and MAC Address Learning Work
Network switches connects devices within a LAN, forwarding data based on MAC addresses, improving efficiency and security, and managing traffic.
Explore Network Switches Explained — How Ethernet Switching and MAC Address Learning Work
Layer 2 Switches Explained — MAC Learning, Frame Forwarding and Ethernet Switching
Layer-2 switches operate at the data link layer, using MAC addresses for high-speed, low-latency communication within LANs. They offer VLAN support, STP, and access control.
Explore Layer 2 Switches Explained — MAC Learning, Frame Forwarding and Ethernet Switching
Understanding Layer-3 Switch: Advanced Routing and Switching
A Layer-3 switch combines advanced routing with Layer 2 switching, enabling efficient VLAN segmentation, QoS, and access control features.
Explore Understanding Layer-3 Switch: Advanced Routing and SwitchingJust published
Latest articles
What Is Patch Management?
Patch management is the process of identifying, testing, prioritizing, deploying, and verifying software updates that fix security vulnerabilities, bugs, or other problems in operating systems, applications,…
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Network Switches — Part 2: VLANs, Trunking, STP, Security and Cisco Configuration
In Part 1, we learned how network switches connect devices, learn MAC addresses and forward Ethernet frames. All departments use the same physical switching infrastructure. Should…
Explore Network Switches — Part 2: VLANs, Trunking, STP, Security and Cisco Configuration
LACP Explained: Static vs Passive vs Active with Real Lab Examples
LACP enhances network reliability by bundling links into EtherChannels, offering bandwidth, redundancy, and efficient management through various configuration modes.
Explore LACP Explained: Static vs Passive vs Active with Real Lab Examples
Static Routing vs Dynamic Routing — When Should You Use Each?
Routers need routing information before they can forward packets toward remote networks. There are two major ways to provide this information: With static routing, an administrator…
Explore Static Routing vs Dynamic Routing — When Should You Use Each?
Check Point Firewall Basic Configuration — Part 2: Security Policies, NAT, Logging and Verification
Prerequisites: Configured Gaia Interfaces, Network Routing, SmartConsole Access and Established SIC Imagine an employee sitting in the office trying to open a business website. The computer…
Explore Check Point Firewall Basic Configuration — Part 2: Security Policies, NAT, Logging and Verification
Cisco Firepower Firewall Hardware Explained — Part 2: 2100, 4100 and 9300 Series Comparison
Prerequisites: Firewall Fundamentals, Throughput, VPN, High Availability and Basic Cisco Security Administration Imagine an enterprise is replacing its older Cisco ASA firewall. The network team identifies…
Explore Cisco Firepower Firewall Hardware Explained — Part 2: 2100, 4100 and 9300 Series ComparisonCalculate. Inspect. Create.
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Networking foundations
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Check Point firewalls
Follow packet flow, configure a firewall, then explore NAT and resilience.
- Check Point Firewall Packet Flow
- Check Point Firewall Basic Configuration — Part 1: Gaia Setup, SmartConsole and Gateway Registration
- Check Point NAT Types – Secure Your Network with the Right Translation
- Check Point ClusterXL Configuration Explained — High Availability, SIC, Virtual IPs and SmartConsole
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Modern web transport
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