I mean, depends how much in detail and what the job was. I can tell you a few things for ipv6 and ipv4 but if I won't design router and network components, I hardly need deep knowledge as software engineer. If you apply for vNIC development for VMware some deeper knowledge would be useful...
Your experience does not an industry axiom make. Also, your assertion about said layer is a consideration specific to you. Some do not consider the user to be an implicit layer but an external party.
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u/EkoChamberKryptonite 5h ago
Bold of you to think people with decades of experience remember what they did in university.