Isolating the server from the network is the correct first step because containment is the immediate priority in any incident response, especially when unusual outbound traffic suggests a potential command-and-control channel. The server, which normally communicates only internally, is now making outbound connections to an external IP on port 443/tcp, a classic sign of data exfiltration or C2 activity. On the Systems Security Certified Practitioner SSCP exam, this scenario tests your understanding of the incident response lifecycle and the order of volatility; a common trap is to run an antivirus scan or shut down the server, which destroys volatile evidence like memory-resident malware. Instead, network isolation halts the threat without losing forensic data. Remember the mnemonic “ICE” for Incident response: Isolate, Contain, then Examine.
SSCP Incident Response and Recovery Practice Question
This SSCP practice question tests your understanding of incident response and recovery. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A security analyst detects unusual outbound traffic from a server that normally communicates only with internal systems. The firewall logs show connections to an external IP address on port 443/tcp. Which incident response step should the analyst perform FIRST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Isolate the server from the network.
The unusual outbound traffic to an external IP on port 443/tcp from a server that normally only communicates internally indicates a potential compromise, such as a command-and-control (C2) channel. The first priority in incident response is containment to prevent further data exfiltration or lateral movement, and isolating the server from the network achieves this without destroying volatile evidence. Shutting down the server or running an antivirus scan could destroy memory-resident malware or forensic artifacts, violating the order of volatility.
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.
✗
Run a full antivirus scan on the server.
Why it's wrong here
Scanning may alert the attacker and does not prevent ongoing data exfiltration.
✓
Isolate the server from the network.
Why this is correct
Containment stops the threat from causing further damage.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Immediately shut down the server.
Why it's wrong here
Shutdown may destroy volatile evidence and degrade system availability.
✗
Disconnect the entire network segment.
Why it's wrong here
This may cause unnecessary business disruption; isolate only the affected system.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that immediate shutdown or antivirus scanning is the correct first step, but the trap here is that containment (isolation) must precede any destructive or investigative actions to preserve evidence and limit damage.
Detailed technical explanation
How to think about this question
Port 443/tcp is commonly used for HTTPS traffic, but in this context, the server's baseline shows no external communication, so the traffic likely represents a C2 beacon using TLS encryption to blend in. The incident response order of operations (NIST SP 800-61) prioritizes containment before eradication or recovery; isolation via network segmentation (e.g., disabling the switch port or applying an ACL) preserves the server's state for memory forensics and log analysis. In real-world scenarios, such as the SolarWinds attack, isolating compromised hosts early prevented lateral spread while allowing investigators to capture live C2 traffic.
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 security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
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.
Incident Response and Recovery — This question tests Incident Response and Recovery — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Isolate the server from the network. — The unusual outbound traffic to an external IP on port 443/tcp from a server that normally only communicates internally indicates a potential compromise, such as a command-and-control (C2) channel. The first priority in incident response is containment to prevent further data exfiltration or lateral movement, and isolating the server from the network achieves this without destroying volatile evidence. Shutting down the server or running an antivirus scan could destroy memory-resident malware or forensic artifacts, violating the order of volatility.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A security analyst detects unusual outbound traffic from a server to a known malicious IP. The server is running a critical business application. What should the analyst do FIRST?
medium
A.Block all traffic from that server
B.Run antivirus on the server
✓ C.Disconnect the server from the network
D.Alert the system administrator
Why C: Option D is correct because immediate containment by disconnecting the server stops potential data exfiltration. Option A is too broad and may affect operations. Option B delays containment. Option C is not a containment action.
Last reviewed: Jun 30, 2026
Question Discussion
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This SSCP practice question is part of Courseiva's free ISC2 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 SSCP exam.
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