https://aperturezone.com/tags/arp/ Recent content in ARP on Aperture Zone https://aperturezone.com/logo.webp https://aperturezone.com/logo.webp Hugo -- gohugo.io fr-fr Thu, 16 Jul 2026 00:00:00 +0000 https://aperturezone.com/posts/adresses-mac/ Thu, 16 Jul 2026 00:00:00 +0000 https://aperturezone.com/posts/adresses-mac/ <p>This article builds on the <a href="https://aperturezone.fr/posts/rj45/">RJ45 guide</a>. In that guide, we discussed copper, twisted-pair cables, and crimping: the <strong>physical layer</strong>. Here, we’re moving up a level—just one, but the one everyone skips. Between the cable and the IP address, there’s an entire layer that most people pass through without noticing it: <strong>Layer 2</strong>, the layer of MAC addresses.</p> <p>And that’s a shame, because that’s where a good half of everyday network incidents are resolved, and where attacks that haven’t aged a bit in thirty years are carried out.</p>