Networking

Interface configuration with nmcli, static IP addresses, DNS, hostname, and basic routing. Roughly 8% of the EX200 exam.

Network configuration with nmcli

New

Create and modify NetworkManager connections with nmcli, set static IP addresses, DNS, hostname, and persistent routes — the modern RHEL way.

~35 min~70% of domain🔒 Sign innmclihostnamectlstatic-ipdns

Hostname & name resolution

New

Configure the system hostname with hostnamectl, manage static name → IP mappings in /etc/hosts, and set DNS servers via NetworkManager.

~25 min~20% of domain🔒 Sign inhostnamectl/etc/hostsgetentdns

Firewalld zones & masquerade

New

Manage firewalld zones at the navigation layer: query and change the default zone, list active zones, and toggle IPv4 masquerade for NAT.

~25 min~5% of domain🔒 Sign infirewalldfirewall-cmdzonesdefault-zone

Network troubleshooting

New

Walk the four-layer triage flow (link → address → routing → resolution) with ip, nmcli, and systemctl. Recover broken connections, missing routes, and stopped daemons.

~30 min~5% of domain🔒 Sign inipnmclisystemctlNetworkManager