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Welcome to the Network Security Foundation Master Class with Prabh Nair. In this session we stitch together every core building block of networking so you can design and defend real-world environments. You will see clear visuals on network scope, media, devices, topologies and performance metrics and learn how each choice changes the threat surface. WHAT YOU’LL LEARN • Seven OSI layers – purpose, common attacks, hardening tips • TCP ⁄ IP vs OSI – why both still matter in 2025 • IPv4 vs IPv6 – subnetting, CIDR, private ranges, NAT, SLAAC • MAC vs IP vs port – the “street address” logic of packets • Network topologies – bus, star, ring, mesh, hybrid risks • Key protocols – TCP, UDP, ICMP, ARP, DNS, HTTP ⁄ HTTPS, SMTP • How protocol addresses map to OSI layers for security logging • Real-world packet walk-through in Wireshark Part 1 https://youtu.be/tHc4XLDbPLc Network Security https://www.youtube.com/watch?v=Y3ozkAFuiHc&list=PL0hT6hgexlYzX6AWwcyDbAZQUKYJL2Mdt&pp=gAQB SOC Playlist https://www.youtube.com/watch?v=zCLlrFZU0M8&list=PL0hT6hgexlYxd24Jb8OE7vZoas-iTcHAc CISO talks https://www.youtube.com/playlist?list=PL0hT6hgexlYwPTD-wC3oFBe27VGEiizg1 NIST Series https://www.youtube.com/watch?v=VcC_KabV_Ho&list=PL0hT6hgexlYy0vBwMv0eteiyAxB48RQzy&pp=gAQBiAQB GRC Series https://www.youtube.com/watch?v=mq_vSLHm4r0&list=PL0hT6hgexlYztA41j1bceTfVagP9mtq28&pp=gAQB ISO 27001 Video https://www.youtube.com/watch?v=sQqJH2naU6I&t=1454s&pp=ygUeaXNvIDI3MDAxIGltcGxlbWVudGF0aW9uIHN0ZXBz ISO 27001 Implementation Guide https://www.youtube.com/watch?v=GBfwk10Hh-o&pp=ygUeaXNvIDI3MDAxIGltcGxlbWVudGF0aW9uIHN0ZXBz GRC Practical Series https://www.youtube.com/playlist?list=PL0hT6hgexlYztA41j1bceTfVagP9mtq28 GRC Interview https://www.youtube.com/playlist?list=PL0hT6hgexlYz1Usn1Nrnur6OzVoz59zyl Internal Audit https://www.youtube.com/playlist?list=PL0hT6hgexlYyNWBcGYfabwumCr0GKmLWv Study with Me Telegram Group https://t.me/Infoseclearning My Instagram https://www.instagram.com/prabhnair/ My Spotify https://open.spotify.com/show/16M7QBKdPDW7CCzBgrrZRE #computernetworking #osimodel #protocol #cybersecuritycompany #cybersecuritycareers
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