Network Administrator Network AdministratorNetworking FundamentalsNetwork Models (OSI, TCP/IP)Network Protocols (TCP, UDP, IP, ICMP, DHCP, DNS)LAN, WAN, and MANNetwork Topologies (Bus, Star, Ring, Mesh)Network Devices (Switches, Routers, Firewalls, Load Balancers)Network Design and ArchitectureNetwork Planning and DocumentationIP Addressing and SubnettingVLANs and TrunkingRouting Protocols (OSPF, BGP)Network Security Design (DMZ, VPN, ACLs)Network InfrastructureLAN Configuration and ManagementWAN Configuration and ManagementWireless NetworkingNetwork Monitoring and TroubleshootingNetwork Performance OptimizationNetwork Services and ProtocolsDHCP (Dynamic Host Configuration Protocol)DNS (Domain Name System)NAT (Network Address Translation)VPN (Virtual Private Network)FTP (File Transfer Protocol)SNMP (Simple Network Management Protocol)Network SecurityFirewall Configuration and ManagementIntrusion Detection and Prevention Systems (IDS/IPS)Access Control Lists (ACLs)Network Segmentation and SegregationSecurity Auditing and ComplianceNetwork Administration ToolsNetwork Monitoring Tools (e.g., Nagios, Zabbix)Network Configuration Management Tools (e.g., Cisco Prime, SolarWinds)Packet Capture and Analysis Tools (e.g., Wireshark)IP Address Management (IPAM) ToolsNetwork Troubleshooting ToolsNetwork Operating SystemsCisco IOSJuniper JunosWindows ServerLinux Networking (e.g., iptables, routing, networking configuration)Network VirtualizationVirtual Local Area Networks (VLANs)Virtual Private Networks (VPNs)Software-Defined Networking (SDN)Network Function Virtualization (NFV)Network Virtualization Platforms (e.g., VMware NSX, Cisco ACI)Cloud NetworkingPublic Cloud Networking (e.g., AWS VPC, Azure Virtual Network)Hybrid Cloud NetworkingSoftware-Defined Wide Area Networking (SD-WAN)Cloud Network SecurityCloud Network Monitoring and Management