Cisco networking fundamentals (IP addressing, VLANs, routing protocols, Cisco IOS)
firewall ACL configuration and troubleshooting (ASA or equivalent)
protocol/packet level troubleshooting using tools such as sniffers, protocol analyzers, NetFlow, and log analysis
DoD STIGs and Information Assurance compliance requirements
network operations center (NOC) or help desk environment, including ticketing and customer communications
multicast routing, OSPF, EIGRP, BGP, and PIM
+4 more