Implement and maintain existing LAN / WAN (L2/L3, spanning tree, VTP, VLANs, physical cabling), remote VPN software, network control protocols (QOS, PoE, NTP, DHCP), network management protocols (CDP,SNMP), and security protocols (SSH, HTTPS, AAA). Implement and maintain existing LAN (L2/L3, spanning tree, VTP, VLANs, physical cabling), remote VPN software, network control protocols (QOS, PoE, NTP, DHCP), network management protocols (CDP,SNMP), and security protocols (SSH, HTTPS, AAA).