Enterprise Network Simulation (Cisco Packet Tracer), Designed multi-layer topology with routers, switches, servers, and clients., Configured routing protocols, VLANs, DHCP, NAT, trunking, inter-VLAN routing., Implemented ACLs for secure traffic segmentation., Tested connectivity, optimized traffic flow, and documented topology., Network Troubleshooting Lab, Diagnosed connectivity failures using ping, traceroute, Wireshark., Fixed misconfigured VLANs, incorrect IP addressing, and DHCP issues., Resolved DNS failures and inconsistent routing entries., Basic Network Security Configuration, Configured port security, SSH remote access, access lists., Implemented basic switch hardening and password encryption., Performed scanning with Nmap to verify exposed services., Client-Server Network Deployment, Set up web server and database server with proper segmentation., Tested network load, failover scenarios and packet flow analysis., Network Security Demonstration Lab, Setup firewall filtering rules using ACLs., Demonstrated port scanning behavior and mitigation., Analyzed packet flows using Wireshark., Linux Admin & Hardening Practice, User management, file permissions, service control., Configured SSH hardening and basic firewall rules.