Subnetting, Routing, VPLS, Ip Addressing, Multicast, Qos, Firewalls, Spine leaf technology, Repairing Cisco equipment, Bridge domain, ACI, Tenant VRF, Mpls, Switching, Cisco products, Cisco LAN WAN technologies, Netscout network monitoring tool, F5 load-balancer, Gateway Load Balancers, RMA process, V-XLAN, VPRN, SD-WAN