Linux Expert - Networking Specialist

Validates expert-level Linux networking skills including advanced interface configuration, routing and policy routing, DNS resolution behavior and troubleshooting, network namespace isolation, nftables and firewall architecture, packet capture and analysis, VPN configuration with WireGuard, traffic shaping with tc, bonding and LACP, VLAN trunking, eBPF/XDP packet processing, reverse proxy and load balancing design, and complex multi-hop troubleshooting scenarios.