https://networking.wyattau.com Networking reference notes covering protocols, configuration, and administration. en Wed, 22 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/favicon.svg https://networking.wyattau.com https://networking.wyattau.com/01-osi-model/the-seven-layers-of-the-osi-model Physical, data link, network, transport, session, presentation, and application layers with protocols and device mappings. Tue, 21 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/01-osi-model/the-seven-layers-of-the-osi-model https://networking.wyattau.com/02-ip-addressing/ipv4-addressing-and-subnetting IPv4 address classes, CIDR notation, subnet masks, VLSM, and worked subnetting calculations with practical examples. Mon, 20 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/02-ip-addressing/ipv4-addressing-and-subnetting https://networking.wyattau.com/02-ip-addressing/ipv6-addressing IPv6 address format, address types (unicast, multicast, anycast), header differences from IPv4, and transition mechanisms. Sun, 19 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/02-ip-addressing/ipv6-addressing https://networking.wyattau.com/03-tcp-udp/tcp-three-way-handshake-and-flow-control Connection establishment, sequence and acknowledgement numbers, sliding window, congestion control (slow start, AIMD), and TCP states. Sat, 18 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/03-tcp-udp/tcp-three-way-handshake-and-flow-control https://networking.wyattau.com/03-tcp-udp/udp-and-comparison-with-tcp User Datagram Protocol, header format, unreliability, and when to use UDP vs TCP for applications like DNS, VoIP, and streaming. Fri, 17 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/03-tcp-udp/udp-and-comparison-with-tcp https://networking.wyattau.com/04-dns/dns-resolution-and-record-types Hierarchical DNS, recursive vs iterative queries, A, AAAA, CNAME, MX, TXT, and NS records, plus TTL and caching behaviour. Thu, 16 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/04-dns/dns-resolution-and-record-types https://networking.wyattau.com/05-http-https/http-methods-and-status-codes GET, POST, PUT, DELETE, PATCH, status code classes (1xx-5xx), RESTful conventions, and content negotiation with examples. Wed, 15 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/05-http-https/http-methods-and-status-codes https://networking.wyattau.com/06-tls/tls-handshake-and-certificate-chains TLS 1.3 handshake, key exchange, symmetric encryption, certificate authorities, trust chains, and OCSP stapling. Tue, 14 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/06-tls/tls-handshake-and-certificate-chains https://networking.wyattau.com/07-network-tools/wireshark-and-packet-analysis Capturing traffic, display filters, protocol dissection, following TCP streams, and diagnosing network issues with Wireshark. Mon, 13 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/07-network-tools/wireshark-and-packet-analysis https://networking.wyattau.com/08-layer2/ethernet-and-mac-addresses Ethernet frames, MAC address structure, ARP protocol, switching, VLANs, and STP with practical configuration examples. Sun, 12 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/08-layer2/ethernet-and-mac-addresses https://networking.wyattau.com/09-wireless/wi-fi-standards-and-security 802.11 standards (a/b/g/n/ac/ax), channel allocation, SSID, WPA3, and enterprise wireless network design considerations. Sat, 11 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/09-wireless/wi-fi-standards-and-security https://networking.wyattau.com/10-email-and-app-protocols/smtp-imap-and-pop3 Email protocols, message flow, SMTP relay, IMAP folders vs POP3 download, MIME types, and email security (SPF, DKIM, DMARC). Fri, 10 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/10-email-and-app-protocols/smtp-imap-and-pop3 https://networking.wyattau.com/07-network-tools/network-address-translation-and-port-forwarding NAT types (static, dynamic, PAT), port forwarding configuration, hairpin NAT, and troubleshooting common NAT issues. Thu, 09 Jul 2026 00:00:00 +0000 https://networking.wyattau.com/07-network-tools/network-address-translation-and-port-forwarding https://networking.wyattau.com Networking reference notes covering OSI model, IP addressing, TCP/UDP, DNS, HTTP/HTTPS, TLS, network tools, Layer 2, wireless, and email protocols. Wed, 08 Jul 2026 00:00:00 +0000 https://networking.wyattau.com