F5-CTS-LTM BIG-IP Local Traffic Manager Practice Question
Exhibit
tmsh show ltm virtual /Common/vs_app_test
Ltm::Virtual Server: /Common/vs_app_test
Status: Available
Pool: /Common/pool_app_test
Destination: 10.0.0.1:443
Availability: Available
Ltm::Virtual Server: /Common/vs_app_test
ClientSide Traffic:
Bits In: 1.2M
Bits Out: 4.5M
Total Connections: 50
ServerSide Traffic:
Bits In: 0
Bits Out: 0
Total Connections: 0Refer to the exhibit. The virtual server is showing client-side traffic but no server-side traffic. What is the most likely reason?
⚠ Common exam trap
Candidates frequently suspect routing or client-side SSL issues when seeing no server-side traffic, missing the fundamental indicator that all pool members are down.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All pool members are currently marked down by health monitors.
When a virtual server shows incoming client traffic but zero outgoing server traffic, it usually indicates that the BIG-IP cannot establish a connection to the pool members. This is often caused by a pool being empty, all members being marked down by health monitors, or a routing issue preventing the BIG-IP from reaching the backend servers. The lack of server-side connections confirms the BIG-IP is not successfully forwarding requests.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The virtual server is configured with an incorrect destination IP address.
Why it's wrong here
If the destination IP were incorrect, the BIG-IP would not process the traffic at all, and the Virtual Server stats would not increment. Since 'Bits In' shows data, the traffic is reaching the virtual server successfully, meaning the VIP is correctly mapped to the client request.
- ✓
All pool members are currently marked down by health monitors.
Why this is correct
If all pool members are down, the BIG-IP will refuse or reset connections because it has no destination to forward traffic to. The client-side stats increase because the VIP receives the packet, but no server-side connections are opened, which matches the exhibit showing zero server-side traffic.
- ✗
The client is sending traffic that does not match the HTTP profile.
Why it's wrong here
If the traffic did not match the profile, the BIG-IP would typically send a reset (RST) to the client, but it wouldn't necessarily stop server-side connection attempts unless the protocol mismatch prevented the BIG-IP from proceeding. The zero server-side connection count suggests a deeper reachability issue.
- ✗
The BIG-IP is configured with an incorrect default gateway.
Why it's wrong here
An incorrect default gateway would affect all traffic. If the BIG-IP receives client traffic, the gateway is likely functioning for the inbound path. The issue specifically lies in the egress traffic to the pool, implying the problem is contained within the load balancing pool configuration.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official F5 exam blueprint
This F5-CTS-LTM practice question is part of Courseiva's free F5 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the F5-CTS-LTM exam.