A Beginner’s Guide to VLANs, Gateways, DNS, and Subnet Masks

This article explains networking fundamentals such as VLANs, single‑arm routing, layer‑3 switches, gateways, DNS, MAC addresses, IP addressing, and subnet masks, using simple analogies and examples to illustrate how devices communicate across different network segments.

DNSLayer 3 SwitchNetworking Basics

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A Beginner’s Guide to VLANs, Gateways, DNS, and Subnet Masks

macrozheng

Mar 10, 2020 · Fundamentals

Understanding 0.0.0.0 vs 127.0.0.1: When to Use Each IP Address

This article explains the fundamental differences between the special IPv4 addresses 0.0.0.0 and 127.0.0.1, covering their classifications, typical usages such as default routing and loopback testing, and practical considerations for binding services in server environments.

0.0.0.0127.0.0.1IP address

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Understanding 0.0.0.0 vs 127.0.0.1: When to Use Each IP Address