SD-WAN technologies (Cisco Viptela / Meraki / Fortinet), WAN routing (BGP, IPsec, MPLS underlay), overlay design & traffic steering, application-aware routing, multi-cloud networking (Azure, AWS, GCP), Aviatrix (transit architecture, gateway deployment, cloud networking automation), Akamai (security services, CDN, edge connectivity, zero-trust concepts), cloud connectivity (site-to-cloud, inter-region, hybrid connectivity), VPN (IPSec/SSL), segmentation & security policies, Zscaler / SSE/SASE concepts, network performance optimization, troubleshooting overlay/underlay issues, monitoring & analytics tools, basic automation (APIs, Terraform/Ansible), high availability & failover design.
