Learn how to use netcat (nc) for port testing, establishing TCP and UDP connections, network troubleshooting, and managing services in developer and DevOps workflows.
Master the curl command-line tool for network debugging, HTTP request generation, header inspection, and API troubleshooting in DevOps workflows.
Master network troubleshooting with a systematic, layer-by-layer workflow. Learn how to isolate DNS, routing, port, and application issues using essential CLI tools.
Master the fundamentals of TCP ports, sockets, listening states, and common service ports. Learn practical diagnostic commands and DevOps troubleshooting workflows.
A practical, developer-first guide to http headers, covering request and response metadata, content negotiation, authorization, caching, and production security.
A practical, developer-first reference guide to http methods covering traffic flow, safety, idempotency, CLI verification, and API workflows.
Master dns troubleshooting with a practical, developer-first checklist. Learn how to use dig, nslookup, query authoritative servers, and resolve complex DNS errors.
Demystify dns propagation, TTL settings, and resolver caching. Learn how DNS changes actually distribute across networks and how to troubleshoot using dig and nslookup.
A practical, developer-first guide to understanding DNS records, managing zones, using command-line diagnostic tools, and avoiding configuration pitfalls.
A practical, developer-first guide to the Domain Name System (DNS), covering resolution flows, record types, caching, TTLs, and command-line troubleshooting.
A practical, developer-first guide to the Dynamic Host Configuration Protocol (DHCP), covering the DORA process, lease timers, and troubleshooting network assignment failures.
Learn how the Address Resolution Protocol (ARP) maps Layer 3 IP addresses to Layer 2 MAC addresses, inspect neighbor tables, and troubleshoot network issues.
Master CIDR notation, subnet masks, and IP range calculations. Learn how to size cloud VPCs, configure network prefixes, and verify routing with practical DevOps examples.
A practical, developer-first comparison of IPv4 and IPv6 covering address formats, address space exhaustion, NAT, dual-stack deployment, and command-line troubleshooting.
A practical, developer-first guide to understanding IPv4 addressing, subnetting, CIDR notation, private IP ranges, and real-world network troubleshooting.
A comprehensive, developer-first guide to private IP addresses, RFC 1918 ranges, NAT mechanics, cloud VPCs, and local network troubleshooting.
Compare tcp vs udp protocols, understand connection-oriented vs connectionless mechanics, and learn practical command-line troubleshooting workflows for DevOps engineers.
Master tcp ip networking fundamentals for developers and DevOps engineers. Explore network layers, encapsulation, packet flow, and verification commands.
Master networking for developers with this practical guide. Learn TCP, DNS, HTTP, ports, sockets, and layer-by-layer troubleshooting workflows.
A practical developer-first networking roadmap covering IP addressing, DNS, TCP/UDP, TLS, Linux utilities, and cloud/container topologies for DevOps engineers.
Learn the basics of client and server architecture, the request-response cycle, and how digital communication works in system design.
Discover how the internet works from end to end. Learn about web requests, clients, servers, databases, and why system design matters at scale.
A beginner-friendly Telugu-English guide explaining how the internet works, from opening a mobile app to server responses and system design basics.