Network Engineer Network EngineerNetworking 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 ImplementationNetwork Requirements AnalysisNetwork Infrastructure DesignNetwork Device ConfigurationVLAN ConfigurationRouting Protocols (OSPF, EIGRP, BGP)Network Troubleshooting and MaintenanceNetwork Monitoring and AnalysisTroubleshooting Network IssuesNetwork Performance OptimizationFirmware and Software UpdatesNetwork DocumentationNetwork SecurityNetwork Security PrinciplesFirewalls and Access Control Lists (ACLs)VPN (Virtual Private Network)Network SegmentationIntrusion Detection and Prevention Systems (IDS/IPS)IP Addressing and SubnettingIPv4 and IPv6 AddressingSubnetting and SupernettingIP Address Management (IPAM)Network Address Translation (NAT)DHCP (Dynamic Host Configuration Protocol)Routing and SwitchingLayer 2 SwitchingVLANs and TrunkingSpanning Tree Protocol (STP)Layer 3 RoutingVRF (Virtual Routing and Forwarding)Network Protocols and TechnologiesTCP/IP SuiteDNS (Domain Name System)DHCP (Dynamic Host Configuration Protocol)SNMP (Simple Network Management Protocol)NAT (Network Address Translation)Network ServicesWAN Technologies (MPLS, Frame Relay, PPP)VPN (Virtual Private Network)Wireless NetworkingVoIP (Voice over IP)Network Time Protocol (NTP)Network InfrastructureLAN Configuration and ManagementWAN Configuration and ManagementWireless NetworkingNetwork Load BalancingNetwork VirtualizationNetwork Monitoring and Management ToolsNetwork Monitoring Systems (NMS)Packet Capture and Analysis Tools (e.g., Wireshark)Configuration Management Tools (e.g., Ansible, Puppet)Network Performance Monitoring ToolsSNMP Management ToolsNetwork Operating SystemsCisco IOSJuniper JunosHPE Aruba OSNetwork OS for Software-Defined Networking (SDN)Network Standards and ProtocolsEthernet StandardsTCP/IP Protocol SuiteIEEE 802.11 Wireless StandardsVPN Protocols (IPSec, SSL/TLS)Routing Protocols (OSPF, BGP, RIP)Network Cabling and InfrastructureCable Types (Cat5e, Cat6, Fiber Optic)Patch Panels and RacksCable ManagementNetwork Equipment InstallationPower and Cooling Considerations