10 58Cheat sheet: OSI layers mapped to real protocols & PDUsSharing the table I keep next to me during labs — each OSI layer mapped to protocols you actually touch and the PDU name: | Layer | Name | Examples | PDU | |------|------|----------|-----| | 7 | Application | HTTP, DNS,…osifundamentalsprotocolsstudy-notesben31833 · posted Jun 6, 2026
10 40Module 2: fastest way to find which subnet a host belongs to?I'm on the Addressing module and the subnetting drills are killing me on time. Given 172.16.20.45/27, how do I work out the network address and the valid host range quickly, without long division? Is there a trick…subnettingaddressingipv4examitayitayy · posted Jun 4, 2026