Raymond Zhu

June 29, 2022

Why 1G network caps at 940Mbps?

1G ethernet or even 1G internet access becomes very affordable for home usage. However, if you do speed test (iperf3 for local area network or speedtest.net for internet), if everything is well configured, the speed is very likely capped at 940Mbps regardless what cable you use, wire or wireless, what brand of the router/switch. Why is...
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June 16, 2022

Leader is trained

I joined a carpentry workshop in 2015 with zero knowledge of how to operate all those machineries and tools. I really appreciated that the tutor walk me through most of the common tools there so that I can follow exactly what he did to get started. They also show me videos of bad examples that what would’ve happen had it not operated r...
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May 22, 2022

Generalist vs Specialist

ISP (China Telecom) offered an all-in-one (modem, routing/NAT, 4-lan-port switch and Wi-Fi) router. The installation and setup was very quick, in 30mins, the cable was installed and system was up and running. It started well but the more I use it, the more limitation emerges. It's one device can do all things but each thing is suboptim...
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August 31, 2021

Communication

In corporate world, there is often misunderstanding that people need to improve on communication skills. Communication is the externalization of how we observe, sense, understand, organize, think and believe by leveraging language. It's too general and often confusing to say communication skills. If people don't speak up, maybe it's du...
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March 23, 2021

Mac Mini as Gateway

M1 power consumption is low enough to run as network gateway 24x7. Data Source: https://support.apple.com/en-gb/HT201897
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