Hello, I am a certified cyber security specialist with CCNA certificates. I have experience in networking and networking simulation software like 

• GNS3
• Cisco Packet Tracer
• Putty 
• Secure CRT
• Microsoft Visio
• PRTG Network Monitor
• WIRESHARK 
• EVE-NG
• Network Simulator -NS3
• SNMP Agent Simulator

My responsibilities

Maintain and administer computer networks and related computing environments including computer hardware, systems software, applications software, and all configurations

Perform data backups and disaster recovery operations.

Diagnose, troubleshoot, and resolve hardware, software, or other network and system problems, and replace defective components when necessary. 

Planned, coordinated, and implement network security measures to protect data, software, and hardware.