Networking

20 posts

2026

Forward Proxy vs Reverse Proxy: What Is the Difference?

10/21/26

A developer opens a website from a company laptop. The site sees a corporate IP address instead of the laptop’s address. Later, a …

What Is a VPN and How Does It Work?

10/16/26

You join an airport Wi-Fi network, open your laptop, and switch on a VPN. A small icon changes, the connection says protected, and the …

vpn networking network-security encryption remote-access

What Is ARP and How Does It Work?

10/9/26

You enter a server’s IPv4 address, press Enter, and expect the network to send a packet. But an Ethernet frame cannot leave your …

networking arp ipv4 ethernet it-fundamentals

LAN vs WAN vs VLAN: What Is the Difference?

9/22/26

Two laptops sit on adjacent desks. Both cables lead to the same switch. One laptop can reach the payroll server; the other cannot. …

networking lan wan vlan it-fundamentals

What Is a Reverse Proxy and How Does It Work?

9/21/26

Your application works perfectly on port 8080. Then you try to put it on the public internet. Suddenly, the application needs a trusted TLS …

reverse-proxy http networking system-design web-servers

Router vs Switch vs Modem: What Is the Difference?

9/1/26

The internet stops working, so you walk toward the shelf with the blinking boxes. One has a coaxial cable. Another has antennas. A third is …

networking routers switches modems internet

What Is Load Balancing and How Does It Work?

8/31/26

The promotion begins at noon. By 12:03, the store has three application servers running and customers are still seeing timeouts. Adding …

system-design networking scalability software-architecture infrastructure

Building InfraLab: A Segmented Proxmox Homelab with VLANs, nftables, and Zabbix

8/24/26

A hands-on infrastructure case study A nested Proxmox lab built on VMware Workstation with VLAN segmentation, a Debian router, nftables, …

proxmox homelab virtualization networking vlan nftables zabbix linux monitoring automation

OSI vs TCP/IP Model: What Is the Difference?

8/21/26

A support ticket says the network has a “Layer 3 problem.” A packet capture shows Ethernet, IP, TCP, TLS, and HTTP. Then someone opens a …

networking protocols tcp-ip it-fundamentals troubleshooting

The OSI Model Explained Layer by Layer

8/15/26

A video call freezes, but ordinary websites still load. Is the Wi-Fi signal weak? Is a router dropping traffic? Is the application stuck, or …

networking protocols it-fundamentals troubleshooting

Troubleshoot Windows Time Synchronization with w32tm

7/18/26

Direct answer Windows time failures should be separated into the configured source, the source that is currently selected, peer …

windows-server troubleshooting networking system-administration

Windows DNS Diagnostics with PowerShell: A Safe Troubleshooting Workflow

7/15/26

Direct answer Windows DNS failures should be separated into three questions: does the machine have the expected interface and resolver …

powershell dns troubleshooting networking

Common Network Ports Every IT Student Should Know

6/21/26

Network ports are one of the first things that make networking feel real. IP addresses tell you which device traffic is going to. Ports tell …

networking protocols tcp udp it-fundamentals

DNS Explained: How Your Browser Finds a Website

6/19/26

When you type compilemymind.com into a browser, your computer does not magically know where that website lives. The browser needs an IP …

networking dns protocols developer-it-tools it-fundamentals

TCP vs UDP Explained With Examples

6/14/26

TCP and UDP are two of the most important protocols in networking. They both live at the transport layer, and they both help applications …

networking protocols tcp udp it-fundamentals

Topics

6/14/26

topics software-development networking cloud it-fundamentals certification cybersecurity

2025

Internet Protocol (IP) Explained: Addressing, Subnets, DHCP, and NAT

11/27/25

Every device on the internet speaks one language at the network layer: IP. Whether a packet travels from your browser to a web server around …

networking protocols it-fundamentals

Network Communication Basics: Ethernet, MAC Addressing, and How Local Networks Work

11/27/25

Networks are everywhere, but most people - including many IT professionals - treat them as black boxes. You plug in a cable, data travels, …

networking protocols it-fundamentals

Understanding Internet Connectivity and Network Cabling: A Complete Guide

11/27/25

Before a single packet reaches your application, it has to traverse an enormous amount of physical and logical infrastructure. Understanding …

networking it-fundamentals infrastructure

Understanding HTTP Status Codes: What They Mean and How to Use Them

11/23/25

HTTP status codes are the server’s vocabulary for telling clients what happened. Three digits. Completely standardized. And yet, …

developer-it-tools networking api-design protocols

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