What to expect in RHCE/RHCSA (EX200 and EX300) : – You need hands on practice on RHEL 7 servers , specially firewall-cmd commands and systemctl to manage the run levels.
- RHCE RHEL 7 exam includes questions on using network teaming or bonding to configure aggregated network links between two Red Hat Enterprise Linux systems.
- Configure IPv6 addresses and perform basic IPv6 troubleshooting, setting up Route IP traffic and create static routes.
- Use firewalld and associated mechanisms such as rich rules, zones and custom rules, to implement packet filtering and configure network address translation (NAT).
- Use /proc/sys and sysctl to modify and set kernel runtime parameters.
- Configure a system to authenticate using Kerberos.
- Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target.
- Produce and deliver reports on system utilization (processor, memory, disk, and network).
- Use shell scripting to automate system maintenance tasks.
I passed the exam after reading this Book , this Certification book covers EX200 and EX300 topics very well, I highly recommend this book by Sander Van :
RHCE RHEL 7 Certification Exam Questions 