Learn networking fundamentals with clear guides on the OSI vs TCP/IP models, IP addressing & subnetting, routing vs switching, DNS & DHCP, NAT/port forwarding,
Showing 9 – 16 of 17 articles
Beginner-friendly NAT explained guide covering what NAT is, why it exists, SNAT vs DNAT, PAT/masquerade, Linux and cloud examples, limitations, and troubleshooting.
A practical guide that explains DHCP, the DORA process, IP leases (T1/T2), common options like router and DNS, and step-by-step troubleshooting for APIPA, scope exhaustion, conflicts, and relay issues.
DNS explained with a clear, step-by-step walkthrough of name resolution, common DNS record types, caching and TTL, resolver roles, troubleshooting commands, and production best practices.
Evergreen guide to VLAN basics covering what VLANs are, why they exist, 802.1Q tagging, access vs trunk ports, native VLANs, inter-VLAN routing, best practices, and troubleshooting.
Beginner-friendly explanation of how routers work, covering routing tables (RIB), FIB vs RIB, next hop resolution, longest prefix match, control plane vs data plane, and packet forwarding steps.
An evergreen beginner guide to IPv6 basics covering address notation, hextets, prefixes and /64 subnetting, SLAAC/DHCPv6, NDP, IPv6 vs IPv4 differences, and transition strategies like dual stack and NAT64.
Beginner-friendly OSI model vs TCP/IP model comparison with layer mapping, protocol examples, troubleshooting guidance, and interview takeaways.
A beginner-friendly explanation of the TCP/IP model, the four TCP/IP layers, how it maps to the OSI model, and how encapsulation appears in packet captures.
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