The answer is that an unusually high signal strength combined with a matching BSSID from a known manufacturer most strongly confirms a rogue AP. This is because a malicious attacker often places their rogue device physically close to victims to ensure their spoofed signal overpowers the legitimate access point, causing clients to connect to the imposter. The BSSID itself may be cloned from a legitimate manufacturer’s range, but the signal strength indicator will be anomalously high compared to the expected baseline for that network. On the CEH exam, this tests your understanding of wireless attack vectors and the importance of physical-layer anomalies—a common trap is focusing only on the BSSID or encryption type, which can be easily spoofed. Remember the mnemonic: “Strong signal, strong suspicion”—if the bars are too high, the AP might be a lie.
CEH Practice Question: Advanced Topics: Wireless, Cloud, IoT, Cryptography
This CEH practice question tests your understanding of advanced topics: wireless, cloud, iot, cryptography. 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.
An analyst captures the following output from a wireless adapter: `[00:1A:2B:3C:4D:5E] 54 Mbps WPA2 CCMP PSK`. The analyst suspects a malicious rogue AP is impersonating a legitimate network. Which of the following indicators would MOST strongly confirm a rogue AP?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The BSSID matches a known manufacturer, but the signal strength is unusually high
A rogue AP often has a higher signal strength than expected, especially if it's placed closer to users. Additionally, a mismatch between the BSSID and the known legitimate AP can indicate spoofing.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 channel number is different from the legitimate AP
Why it's wrong here
APs can change channels dynamically; this is not a strong indicator.
✗
The SSID is broadcasted with the same name as the corporate network
Why it's wrong here
Many rogue APs use the same SSID; that alone is not confirmation without other factors.
✓
The BSSID matches a known manufacturer, but the signal strength is unusually high
Why this is correct
Correct: A high signal strength combined with a BSSID that might be spoofed suggests a rogue AP placed nearby.
WPA2 CCMP is standard; not an indicator of rogue AP.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related CEH subnetting questions on CIDR, address ranges, and subnet selection.
The correct answer is: The BSSID matches a known manufacturer, but the signal strength is unusually high — A rogue AP often has a higher signal strength than expected, especially if it's placed closer to users. Additionally, a mismatch between the BSSID and the known legitimate AP can indicate spoofing.
What should I do if I get this CEH question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related CEH subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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