The candidate must have considerable knowledge and working experience with enterprise routers, switches, VPN concentrators, firewalls, wireless access points, and load balancers, including the ability to document, set up, configure, upgrade, manage, and troubleshoot these systems. Experience with networking features and protocols such as ARP, CDP, EIGRP, OSPF, BGP, VTP, Etherchannel, 802.1Q trunking, HSRP, QoS, multicast, IPsec, RADIUS/TACACS+, SNMP, BRI/PRI, and MPLS.