- Routing: Static Routing , Dynamic Routing(OSPF, EIGRP, BGP) , VRF [lite], NHRP, DMVPN,IPv6
- Switching: FHRP, STP,MST, Switching Security Mechanisms
- Network Security: IPsec, VPN Technologies, Firewall, Hardening. Cisco IOS Firewall and CoPP
, LAN Security(Port-Security , DHCP Snooping , DAI , …) - QoS: Policing, Shaping, Rate Limiting, Prioritizing, etc.