At my current job I do systems admin and network admin. I maintain a network of ten subnets that are all statically routed. I am familiar with configuring firewall policies, static routes, DHCP, ...
You need CLI hands-on experience to do well on the Cisco CCENT and CCNA exams. To get that experience, you can use real routers and switches, a simulator that simulates routers and switches, or an ...