Marcio Cunha

Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

All categoriesArquiteturaAutomaçãoBackendCarreiraDevOpsEletrônicaEngenhariaFrontendHardwareIANegóciosProdutividadeRedes
RedesHardware•12 min

Wi-Fi Roaming: How Phones and Laptops Switch Access Points Without Dropping

Learn how Wi-Fi roaming works, the technology that allows smartphones and laptops to switch between different access points without interrupting network connectivity.

RedesHardware•11 min

PoE Budget: How to Calculate Switch Power Capacity for Cameras and Access Points

Learn how to calculate the PoE power budget of your network switches to reliably power security cameras, access points, and IP phones without failures.

RedesHardware•11 min

802.1Q VLAN Tagging: How Multiple Virtual Networks Share the Same Cable

Learn how the IEEE 802.1Q standard injects tags into data packets to allow dozens of isolated virtual networks to share a single physical cable without interference.

RedesHardware•11 min

LACP Explained: How to Combine Network Ports for Higher Redundancy and Capacity

Learn how the LACP protocol unifies multiple physical network connections into a single logical link, ensuring fault tolerance and greater bandwidth for servers and switches.

HardwareArquitetura•12 min

Secure Enclave: Hardware Isolation, Biometrics, and Cryptography in Apple Devices

Learn how the Secure Enclave uses an isolated processor and hardware-based cryptography to protect vital data like Apple Pay keys, passwords, and biometrics against sophisticated attacks.

Hardware•12 min

BitLocker, FileVault, and LUKS: How Windows, macOS, and Linux Encrypt Disks in Practice

Learn how BitLocker, FileVault, and Linux LUKS protect your computer data at the hardware and software levels. Understand the trade-offs of performance, recovery, and architecture for each system.

Hardware•12 min

TPM 2.0 Explained: How the Security Chip Protects Keys, Disks, and Credentials

Learn how the TPM 2.0 operates in practice to shield operating systems against physical and virtual threats. Discover the mechanics behind secure cryptographic key and credential storage.

RedesHardware•12 min

Modbus Gateway: Integrating RS-485 Serial Devices into Ethernet Networks

Learn how to connect legacy industrial equipment based on RS-485 to modern Ethernet networks using a Modbus Gateway, ensuring interoperability and real-time communication.

RedesHardware•12 min

OpenWrt: How to Turn a Router into a Network Platform

Learn how to replace your router's stock firmware with OpenWrt, gaining total control over traffic, security, and performance using free software.

HardwareDevOps•12 min

Raspberry Pi versus Mini PC: Which to Choose for Home Lab and Self-Hosting

Explore the real technical differences between Raspberry Pi and Mini PCs to build your home lab and run self-hosted services with energy efficiency and performance.