Networking: LAN, TCP/IP, familiar with routing protocols OSPF, IS-IS, BGP, WAN connectivity (Dial-up, leased line, xDSL), NAT, STP, ERPS, VLAN, MPLS (VPRN, VPLS, EPIPE, IES).
Network hardware (Cisco/ALU routers, Cisco/HP/ALU/Huawei/D-LINK switches, Cisco PIX/ASA Firewall), hardware upgrade and troubleshooting.