Networking, security, cloud, and infrastructure reference guides — formatted for quick study.
Cisco proprietary IGP using DUAL algorithm — components, metrics, timers, configuration, and interview questions.
Link-State IGP using Dijkstra's SPF — areas, LSA types, DR/BDR, cost calculation, and configuration.
Path Vector protocol for Internet routing — attributes, best path selection, states, and policies.
Data center fundamentals — components, types, importance, and key concepts for networking engineers.
Core capabilities — security, networking, VPN, SD-WAN, segmentation, deployment modes, and traffic flow.
Certification paths for DevOps, MLOps, Architect, AI Engineer, Security, SRE, and Platform Engineering.
Essential Windows networking commands — ipconfig, ping, tracert, netstat, arp, nslookup, and more.
Compare VMware virtualization and Nutanix hyperconverged infrastructure — strengths, differences, and use cases.
Palo Alto NGFW core concepts: App-ID, User-ID, Content-ID, threat prevention, SSL decryption, and NGFW vs traditional firewall.
Complete Cisco ACI fabric discovery process — APIC setup, LLDP neighbor discovery, DHCP TEP assignment, IS-IS underlay, and cluster formation.
Remote Access, Site-to-Site, Cloud VPN, Mobile VPN, SSL/TLS VPN, and Split Tunnel — use cases and strengths.
50 most used Linux commands for DevOps and Cloud Engineers — navigation, networking, processes, permissions, and compression.
Netmiko, NAPALM, Nornir, Ansible, NETCONF/gNMI, and the GitOps workflow — a pragmatic path from manual CLI to automated fleets.
The Kubernetes network model for network engineers — CNI plugins, Service types, Ingress, cluster DNS, NetworkPolicy, and troubleshooting.
Spine-leaf fabrics with VXLAN overlay and BGP EVPN control plane — VTEPs, route types, anycast gateways, config, and the packet walk.
Zero Trust for network engineers — NIST principles, ZTNA vs VPN, SASE/SSE landscape, microsegmentation, and a pragmatic adoption path.