AWS Cloud: ECS, ALB, VPC, EC2, IAM, S3, Route53, Cloud Front AZURE Cloud: Azure SQL, Databricks in Azure, Key Vault, Virtual mashins, Resource group CI/CD: Gitlab, Bitbucket. Azure DevOps Linux: Ubuntu on x64 and ARM architecture, Bash scripting, Virtualization: Hyper-V, VMware, Proxmox, Freenas Docker: Files, images, containers, docker-compose. transfer container to other host Monitoring: Cloud whach, Zabbix, PRTG, IPAM, SNMP. Network: L2 L3 on Cisco, Fortinet, HPE, Aruba equipment (STP, Loop protect, VLAN, Port security, VPN, SD-WAN