F5 BIG-IP Administration Support and Troubleshooting (F5CAB5) Certification Sample Questions

01. Which load balancing method is most effective for a pool consisting of servers with vastly different hardware specifications (e.g., some with 4 cores, some with 32 cores)?
a) Round Robin
b) Ratio (Member)
c) Observed
d) Fastest

02. You observe that an interface is locked at "100Mbps/Half-Duplex" despite being connected to a 1Gbps switch. The BIG-IP interface is set to "Auto-Negotiate." What is the most likely issue?
a) The switch port is hard-coded to 100/Half.
b) The BIG-IP license does not support 1Gbps.
c) The VLAN is too large.
d) The HTTP profile is causing a slowdown.

03. To identify CPU statistics specifically for a single Virtual Server named "VS_Web_Prod," which tmsh command provides the most granular data?
a) show /sys performance system
b) show /ltm virtual VS_Web_Prod
c) list /ltm virtual VS_Web_Prod
d) show /sys cpu

04. A client reports that their connection to a web application is intermittently dropping. An administrator decides to perform a packet capture. Which command correctly captures traffic for a specific client IP (1.1.1.1) on all interfaces?
a) tcpdump -i any host 1.1.1.1
b) tcpdump -i eth0 host 1.1.1.1
c) cap-trace -ip 1.1.1.1
d) tmsh run /util tcpdump host 1.1.1.1

05. What happens if a pool member is assigned multiple monitors and the "Availability Requirement" is set to "At Least One"?
a) The monitors will conflict and the member will be "Unknown."
b) The member is marked "Down" if any one of the monitors fails.
c) The member is marked "Up" if any one of the monitors passes.
d) The member is marked "Up" only if all monitors pass.

06. A BIG-IP has 4 CPU cores. How many TMM instances (processes) will typically be visible in the system processes by default on a standard physical appliance?
a) 8
b) 2
c) 1
d) 4

07. What is the result if a pool has no members and a client attempts to connect to the associated Virtual Server?
a) The BIG-IP sends a 404 error.
b) The BIG-IP sends a TCP Reset (RST).
c) The BIG-IP forwards the request to the management port.
d) The connection stays in the queue indefinitely.

08. In a "Full Proxy" architecture (like a Standard Virtual Server), how many distinct TCP connections are maintained for a single end-to-end request?
a) 4
b) 3
c) 2
d) 1

09. When viewing top or htop in the bash shell, an administrator sees a process named tmm.0 using 100% of a CPU core. How should this be interpreted?
a) The system is under a DoS attack.
b) TMM is designed to stay busy (polling) and this may be normal behavior.
c) The process has hung and needs to be killed.
d) The management interface is overloaded.

10. If the "Control Plane" CPU usage is high while the "Data Plane" is low, which task is the BIG-IP likely performing?
a) Generating a large QKView or performing a software upgrade.
b) Forwarding packets between VLANs.
c) Running a complex iRule on a Virtual Server.
d) Processing a high volume of SSL handshakes.