—L2/L3: VLAN, STP, OSPF,
BGP
—Cisco / Nexus / ASR /
MikroTik
—Linux networking
—HAProxy / Nginx / L4–L7
балансировка
—DDoS защита (StormWall,
iptables, rate-limit)
—VPN: IPsec / WireGuard /
OpenVPN
—Мониторинг: Prometheus,
Grafana
—TCP/IP stack tuning (sysctl,
nftables)
—Troubleshooting: tcpdump, ss,
iptables -S
—Automation: Bash /
Ansible