20+ practice questions focused on Network and Communications Security — one of the most tested topics on the Systems Security Certified Practitioner SSCP exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Network and Communications Security PracticeA security analyst notices unusual outbound traffic from a server in the DMZ to an external IP address on port 4444. The server runs a web application. Which action should the analyst take first?
Explanation: Option C is correct because the first step in incident response is to gather forensic evidence and understand the scope of the compromise. Checking running processes and established connections allows the analyst to identify the malicious process, its parent, and the active command-and-control (C2) channel on port 4444, which is commonly associated with reverse shells or backdoor traffic. This data is volatile and must be captured before any disruptive action like disconnection or reboot, which would destroy evidence.
A network engineer is designing a secure WAN link between two offices using IPsec VPN. The company requires encryption of all traffic, authentication of both endpoints, and protection against replay attacks. Which combination of IPsec protocols and modes should be used?
Explanation: ESP in tunnel mode encrypts and authenticates the entire original IP packet, providing confidentiality, integrity, and authentication for the entire payload. It also includes sequence numbers to protect against replay attacks, making it the correct choice for a secure WAN link between two offices.
An organization wants to prevent unauthorized devices from connecting to its wired network. Which security control should be implemented?
Explanation: IEEE 802.1X port-based authentication is the correct control because it authenticates each device at the network edge before granting access to the wired LAN. It uses an authentication server (e.g., RADIUS) to verify credentials or certificates, effectively preventing unauthorized devices from connecting. Unlike MAC-based controls, 802.1X provides dynamic, per-session authentication that cannot be easily spoofed.
A company's internal network uses a /24 subnet and has a single firewall connecting to the internet. Employees report that they cannot access an external web server at 203.0.113.50. The firewall has a rule that allows outbound HTTP. What is the most likely cause?
Explanation: The firewall rule allows outbound HTTP, but without NAT configured, the internal hosts' private IP addresses (e.g., 192.168.1.x) are used as source addresses in packets sent to the external web server. The web server at 203.0.113.50 will see these private addresses as the source and attempt to reply to them, but private addresses are not routable on the public internet, so the return traffic never reaches the internal hosts. NAT (specifically source NAT or PAT) translates the private source IP to the firewall's public IP, enabling two-way communication.
A security administrator is configuring a wireless network for a branch office. The office has legacy devices that only support WPA2-PSK. The administrator wants to provide the highest level of security while maintaining compatibility. Which configuration should be used?
Explanation: WPA2-PSK with AES (CCMP) is correct because it provides the highest security level compatible with legacy devices that only support WPA2-PSK. AES-CCMP is the mandatory encryption protocol for WPA2, offering strong data confidentiality and integrity, whereas TKIP is deprecated due to known vulnerabilities. This configuration avoids the need for a RADIUS server (required by WPA2-Enterprise) and does not force an upgrade to WPA3, which legacy devices cannot support.
+15 more Network and Communications Security questions available
Practice all Network and Communications Security questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Network and Communications Security. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Network and Communications Security questions on the SSCP frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Network and Communications Security is tested as part of the Systems Security Certified Practitioner SSCP blueprint. Practicing with targeted Network and Communications Security questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Network and Communications Security is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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