An open-access knowledge base for network engineering protocols, standards, and architecture.
802.3 standards, MAC addressing, VLANs, Spanning Tree Protocol (STP), and frame structures.
IPv4/IPv6 packet headers, CIDR subnetting, fragmentation, and MTU mechanics.
OSPF, EIGRP, and BGP. Path selection algorithms, metric calculations, and convergence.
TCP flow control, windowing, UDP characteristics, and the 3-way handshake.
Leaf-Spine topologies, VXLAN/EVPN overlays, and SDN control planes.
ACLs, IPsec/SSL VPNs, Zone-based Firewalls, and 802.1X identity management.
Infrastructure as Code, Python (Netmiko), Ansible, and REST API integration.
Classification, marking (DSCP), queuing mechanisms (LLQ), and shaping/policing.