Networking is the invisible backbone of every distributed system. Learn protocols, tools, and real-world troubleshooting techniques.
7 layers explained with real-world DevOps context
How data travels across the internet — packets, headers, ports
Domain resolution, record types, TTL and DNS debugging
Request/response cycle, status codes, headers and REST APIs
Certificates, handshakes, Let's Encrypt and HTTPS setup
IPv4, IPv6, CIDR notation and address classes
Subnet masks, VLSM, calculating hosts per subnet
Well-known ports, UDP vs TCP and protocol selection
Round-robin, least connections, HAProxy and Nginx LB
iptables, ufw, security groups and network ACLs
OpenVPN, WireGuard, site-to-site and remote access VPNs
Nginx/Apache as reverse proxy, SSL termination and caching
Understanding how data moves from application to physical and back.
How domain names are resolved to IP addresses in seconds.
Request/response cycles, headers, cookies, and REST semantics.
Network segmentation, VLSM, and IP address planning.
Understand the OSI model, IP addressing, common ports, and basic ping/traceroute diagnostics.
Deep dive into DNS, HTTPS/TLS, subnetting, VPCs, and load balancing configurations.
Master BGP routing, network security policies, service mesh networking, and kernel network stack.
This domain is a core requirement for senior engineering roles.
Jump into interactive sandboxes and solve real-world Networking Fundamentals challenges.