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JNCIA-SEC · topic practice

Monitoring And Troubleshooting practice questions

This domain covers monitoring and troubleshooting on Juniper SRX Series devices using Junos CLI. Candidates must know how to capture live traffic, inspect sessions, use flow traceoptions, and locate security logs. Questions test practical command selection and interpretation for diagnosing packet flow, policy, and resource issues.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Editorial oversight:Johnson Ajibi· MSc IT Security, IEEE Senior Member

20 questionsDomain: Monitoring And Troubleshooting

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What the exam tests

What to know about Monitoring And Troubleshooting

Be able to select and apply the correct Junos CLI command for live packet capture, session inspection, flow tracing, and log review on SRX. The most important thing is knowing which tool answers which troubleshooting question without disrupting traffic.

Using monitor traffic interface with filters to capture live packets

Checking active session counts with show security flow session

Configuring security flow traceoptions with match conditions for troubleshooting

Locating security policy logs in default system log destinations

Watch out for

Common Monitoring And Troubleshooting exam traps

▸Confusing monitor traffic with packet capture tools that require configuration changes or aren't available in Junos CLI.
▸Assuming security policy logs go to a dedicated security log by default, rather than the general system log.
▸Forgetting that flow traceoptions require a match condition and output file to be useful, leading to no output.

Practice set

Monitoring And Troubleshooting questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice

Read the full VPN explanation →

You need to verify the operational status of an IPsec VPN tunnel on an SRX Series device. Which command provides detailed tunnel status including Phase 1 and Phase 2 associations?

Trap 1: show security flow vpn-status

vpn-status is not a valid operational command for security flows.

Trap 2: show security ike sa-detail

While ike has detail options, 'show security ipsec security-associations' is the standard primary command for Phase 2 tunnels.

Trap 3: show vpn ipsec active

This is not valid Junos syntax for IPsec inspection.

Study all Monitoring And Troubleshooting common traps →

A
show security ipsec security-associations
This command queries the SRX's IPsec security-association database, listing both Phase 1 IKE SAs and Phase 2 child SAs with their lifetimes, SPIs and encryption details. It directly satisfies the stem's requirement for detailed tunnel status covering both negotiation phases.
B
show security flow vpn-status
Why it fails: vpn-status is not a valid operational command for security flows.
C
show security ike sa-detail
Why it fails: While ike has detail options, 'show security ipsec security-associations' is the standard primary command for Phase 2 tunnels.
D
show vpn ipsec active
Why it fails: This is not valid Junos syntax for IPsec inspection.

Monitoring And Troubleshooting practice questions

What to know about Monitoring And Troubleshooting

Common Monitoring And Troubleshooting exam traps

Monitoring And Troubleshooting questions

You need to verify the operational status of an IPsec VPN tunnel on an SRX Series device. Which command provides detailed tunnel status including Phase 1 and Phase 2 associations?

You suspect that Network Address Translation (NAT) is misconfigured for a server pool. Which command should you use to examine active NAT translation entries?

An engineer needs to troubleshoot asymmetric routing issues where return traffic bypasses the SRX firewall. Which flow option can be enabled to handle asymmetric paths?

Which command is used to display current CPU and memory utilization on an SRX Series services gateway?

When troubleshooting a high CPU condition caused by security processing, which command helps identify which traffic flows or features are consuming resources?

You suspect that a specific security policy rule is shadowing another rule. How can you review the evaluated order of security policies?

An administrator wants to inspect packet flow drops specifically caused by security policies. Which command displays policy drop counters?

Which command confirms whether the Security Intelligence (SecIntel) feeds or threat feeds are actively updating on an SRX device?

An administrator needs to verify whether IDP (Intrusion Detection and Prevention) is actively inspecting traffic. Which operational command should be used?

An administrator wants to clear all inactive sessions from the security session table to free up resources. Which command achieves this?

You are troubleshooting an issue where security logging is failing to reach the remote syslog server. Which command allows you to test syslog connectivity and queue status?

Which TWO methods can an administrator use to monitor real-time traffic passing through a specific firewall interface? (Choose two)

Which TWO commands can be used to view IPsec VPN security associations on an SRX Series device? (Choose two)

Which THREE parameters can be used to filter output when executing the 'show security flow session' command? (Choose three)

Which TWO commands provide system-level resource utilization data on an SRX Series device? (Choose two)

Which TWO commands help verify security zone configurations and interface memberships? (Choose two)

Which THREE metrics are displayed when monitoring security screening statistics? (Choose three)

An engineer notices that specific traffic is being dropped silently by the SRX Series device. To capture detailed log messages about security policy evaluations, where should traceoptions be configured?

You need to monitor dropped packets in real-time on an SRX Series device without disrupting production traffic. Which tool is best suited for identifying drop counters across security features?

An administrator wants to view log messages generated by security policies. Which syslog facility is typically used by Junos security policies for logging event messages?

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