Network fundamentals such as TCP/IP, DNS, DHCP, and other network protocols. I have knowledge of routing and switching, familiarity with network topologies and architectures. Expertise in configuring and managing network hardware like routers, switches, firewalls, and wireless access points. I have ability to troubleshoot hardware issues. Proficiency in multiple operating systems, especially Windows Server, Linux, and Unix, experience with Active Directory and domain management. Understanding of firewalls, VPNs, intrusion detection/prevention systems, and encryption techniques. Strong analytical skills to diagnose and resolve network issues, experience with network monitoring tools (e.g., Wireshark, Nagios, SolarWinds).