Two or three things about querying MAC addresses and the ARP address resolution protocol

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Today, I learned that the MAC address of the company’s colleagues who applied to the customer for activation was wrong last week. The colleague mistakenly passed the MAC address of the “company computer” to the customer for application, but when he entered the factory, he brought his own laptop to use it. , is really crazy. Then I curiously asked all the engineers in the company if they knew what a MAC address is, and unexpectedly, 1/10 of them didn’t know what it was, which really surprised me. In this article, I try to use relatively simple sentences to show you what a MAC address is.

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This article is reprinted from https://blog.miniasp.com/post/2022/07/18/How-to-get-MAC-address-and-about-ARP-Protocol
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