156-315.81.20 ClusterXL and VRRP High Availability Practice Question
In ClusterXL High Availability mode, how many cluster members can be active for a specific virtual IP at any given time?
⚠ Common exam trap
Candidates confused by load sharing modes incorrectly assume High Availability mode allows multiple members to handle traffic simultaneously for a single virtual IP.
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
✓
Only one member is active at a time.
High Availability mode is designed for redundancy, not load distribution. Consequently, only one member acts as the Active gateway, while the other remains in a Standby state. This ensures a clear ownership of the virtual IP and simplifies troubleshooting, as traffic flow is deterministic. If the active member fails, the standby member promotes itself to active to maintain service availability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
All members are active simultaneously for redundancy.
Why it's wrong here
Active/Active behavior is characteristic of Load Sharing modes, not High Availability mode. In HA mode, only one node is responsible for routing and inspecting traffic for a given virtual IP to avoid MAC address conflicts and ensure consistent stateful inspection across the network traffic flows.
- ✓
Only one member is active at a time.
Why this is correct
High Availability mode enforces a single active node at any time. The standby node monitors the active node through heartbeats and takes over only if the active node fails. This simplifies the network architecture by ensuring that traffic is always processed by one consistent policy and connection table.
- ✗
Up to four members can be active concurrently.
Why it's wrong here
Standard High Availability mode limits active roles to a single node. Allowing multiple active nodes would require a load-sharing architecture, which operates on different principles than HA. HA is strictly focused on failover redundancy, ensuring that there is no split-traffic scenario that would break stateful inspection rules.
- ✗
The number of active members is equal to the number of nodes in the cluster.
Why it's wrong here
If every node in the cluster were active, it would cease to function as a High Availability pair and instead act as a load-sharing cluster. In a High Availability setup, having all nodes active would cause routing instability and prevent the firewall from maintaining a single, unified state table.
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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 Check Point exam blueprint
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