PCNSE Manage, Monitor and Operate Practice Question
This PCNSE practice question tests your understanding of manage, monitor and operate. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Refer to the exhibit.
admin@PA-5250> show session all
Total sessions shown: 1
Session 1:
Source IP: 10.0.0.100
Destination IP: 203.0.113.50
Source port: 49152
Destination port: 443
Protocol: TCP
State: SYN_SENT
Application: incomplete
Bytes: 0
What does the session state 'SYN_SENT' indicate about this traffic flow?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The firewall has sent a SYN packet and is waiting for a response.
The SYN_SENT session state in a Palo Alto Networks firewall indicates that the firewall has sent a SYN packet to initiate a TCP three-way handshake and is awaiting a SYN-ACK response from the remote host. This state is part of the firewall's session setup process, where it tracks the TCP connection state machine to ensure proper traffic flow. It does not imply a teardown, asymmetric routing drop, or incomplete application identification.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 session has been torn down by the server.
Why it's wrong here
A torn-down session would show CLOSE or CLOSE_WAIT.
✓
The firewall has sent a SYN packet and is waiting for a response.
Why this is correct
SYN_SENT indicates the firewall is in the process of opening a connection.
Related concept
Read the scenario before looking for a memorised answer.
✗
The traffic is being dropped due to asymmetric routing.
Why it's wrong here
Asymmetric routing often shows SYN_SENT or SYN_RECV but not exclusively.
✗
The application has been identified as incomplete.
Why it's wrong here
Application detection happens after the session is established.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse SYN_SENT with a session teardown state or assume it indicates a problem like asymmetric routing, when in fact it is a normal transient state during TCP connection setup that only becomes problematic if it persists beyond the timeout.
Trap categories for this question
Command / output trap
A torn-down session would show CLOSE or CLOSE_WAIT.
Detailed technical explanation
How to think about this question
Under the hood, the SYN_SENT state corresponds to the TCP state machine where the firewall (acting as a proxy or stateful inspector) has transmitted a SYN segment and set a retransmission timer (typically starting at 3 seconds per RFC 6298). If no SYN-ACK is received within the configured timeout (default 10 seconds in PAN-OS), the session is aged out and logged as 'SYN_SENT' with a discard reason. In real-world scenarios, this state often indicates a server-side issue, such as a firewall rule blocking outbound traffic, a dead server, or network congestion causing packet loss.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the PCNSE exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Manage, Monitor and Operate — This question tests Manage, Monitor and Operate — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The firewall has sent a SYN packet and is waiting for a response. — The SYN_SENT session state in a Palo Alto Networks firewall indicates that the firewall has sent a SYN packet to initiate a TCP three-way handshake and is awaiting a SYN-ACK response from the remote host. This state is part of the firewall's session setup process, where it tracks the TCP connection state machine to ensure proper traffic flow. It does not imply a teardown, asymmetric routing drop, or incomplete application identification.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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