Network on Kaisekukun

如何 Improve Your Wi-Fi Speed and Fix a Slow Connection

Fri, 20 Mar 2026 15:00:00 +0900

Video buffering? Web pages loading at a crawl? Let’s track down the bottleneck and fix it. The key is measuring your speed first, then eliminating causes one at a time.

Measure Your Current Speed

“Slow” is subjective. Get numbers first. Try Google “speed test” (built-in test in search results), Fast.com (Netflix’s simple tool), or a local Japanese speed test service. Run it three times under the same conditions and average the results. Test at different times of day to spot congestion patterns.

Nov 18, 2025: Massive Cloudflare Outage Took Down X, ChatGPT, Discord — What Happened?

Wed, 19 Nov 2025 06:00:00 +0000

“Last night the internet suddenly stopped working…” “X (Twitter), ChatGPT, even Discord — none of them would load!”

On the night of November 18, 2025, many people experienced exactly this. It wasn’t your phone or Wi-Fi — it was a global-scale Cloudflare outage that disrupted countless services.

Here is the timeline, the surprising cause, and what we can learn from it.

IOWN 详解: NTT's Next-Generation Optical Network and Its Future Potential

Sat, 08 Feb 2025 21:00:00 +0000

Hello!

As communication technology rapidly evolves, our lives and businesses are transforming into an increasingly advanced digital society. Among these developments, NTT’s IOWN (Innovative Optical and Wireless Network) has garnered significant attention as a next-generation communication network. This article explores IOWN’s basic concepts, features, future prospects, and current challenges.

1. What Is IOWN?

IOWN is NTT’s concept for a revolutionary communication infrastructure. It goes beyond traditional optical fiber and wireless communication by integrating optical and wireless technologies to achieve faster speeds, lower latency, and greater energy efficiency. The goal is to dramatically improve data transmission speeds and enable real-time processing of massive data volumes, supporting IoT, 5G/6G, AI, autonomous driving, and more.

The 完整指南 to Choosing and Using a Wi-Fi Router

Fri, 03 Jan 2025 22:00:00 +0000

Hello! Today, we are diving deep into the Wi-Fi router — an essential device for modern life. With smartphones, computers, game consoles, and even home appliances connecting to the internet, a good Wi-Fi environment is crucial. This guide covers how to choose the right router and get the most out of it.

1. Understanding Wi-Fi Router Basics

What Does a Wi-Fi Router Do?

A Wi-Fi router wirelessly delivers internet to devices throughout your home or office. Think of your internet connection as a highway; the router acts as the intersections and off-ramps that distribute traffic throughout your house. Choosing the right router reduces congestion and enables smooth communication.