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Latest 156-551 Exam Practice Questions

The practice questions for 156-551 exam was last updated on 2025-09-15 .

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Question#1

What distinguishes a VSX Cluster in Load Sharing Unicast mode?

A. Interfaces are active-passive

B. Load sharing is session-based across cluster members

C. Only VS0 participates in routing

D. All traffic goes through the active node only

Explanation:
In Load Sharing Unicast mode, ClusterXL uses session-based hashing to distribute traffic across all active cluster members. This enables more efficient resource use and higher throughput in VSX deployments.

Question#2

Which tool should be used to monitor per-VS interface throughput and connection count?

A. vsx_stat

B. cpview

C. ifconfig

D. netstat -i

Explanation:
cpview is an advanced diagnostic tool that shows real-time statistics including bandwidth, CPU, memory usage, and per-VS connection counts. It helps identify bottlenecks and resource-intensive VSs quickly.

Question#3

Which components are mandatory when creating a new Virtual System (VS)? (Choose two)

A. External interface

B. Dedicated routing engine

C. Policy package

D. Virtual Switch or Router connection

Explanation:
When creating a VS, a security policy package must be assigned, and it should be connected to either a Virtual Switch or Router to enable traffic flow. These are essential for functionality.

Question#4

What role does the Security Management Server play in a VSX setup?

A. Acts as a virtual router

B. Hosts firewall policies for VSs

C. Stores log data only

D. Forwards network traffic

Explanation:
The Security Management Server centrally manages security policies for all VSs. It pushes configurations and policies to individual virtual systems running on the VSX Gateway.

Question#5

Which commands help in checking memory allocation per Virtual System? (Choose two)

A. free -m

B. top

C. cpview

D. fw ctl memstat

Explanation:
cpview displays overall and per-VS memory usage in real time, while fw ctl memstat offers detailed statistics on firewall memory allocation. These commands are essential for detecting memory pressure or leaks in the VSX environment.

Exam Code: 156-551Q & A: 140 Q&AsUpdated: 2025-09-15

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