Quick Answer
The answer is Telnet, as it is the correct tool to initiate a connection to gather a banner from any TCP port, including port 4444. Telnet functions as a raw TCP client, allowing you to manually connect to a remote service and often receive a cleartext banner before any encryption handshake begins, which reveals the service name and version for footprinting. On the Certified Ethical Hacker CEH exam, this question tests your understanding of banner grabbing as a reconnaissance technique and the common trap that encrypted traffic prevents service identification—when in fact, the initial banner may be sent unencrypted. A key memory tip is to remember that Telnet is not just for port 23; it is a versatile tool for connecting to any TCP port to grab banners, making it essential for footprinting in the CEH methodology.
This CEH practice question tests your understanding of footprinting, reconnaissance and scanning. 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 incident responder notices unusual outbound traffic from a host that is communicating with an external IP on port 4444. The traffic appears to be encrypted. Which tool could be used to initiate a connection to that external IP to gather a banner for service identification?
traceroute
Why wrong: traceroute shows path but no banner.
nslookup
Why wrong: nslookup is for DNS queries.
Telnet
Telnet can connect to a TCP port and often receives a banner.
ping
Why wrong: ping uses ICMP, not TCP, and does not retrieve banners.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Telnet
Telnet can be used to connect to any TCP port, including port 4444, to manually interact with a service and retrieve its banner. Banners often reveal the service name, version, and other identifying information, which is critical for footprinting and reconnaissance. Even though the traffic is encrypted, the initial banner may be sent in cleartext before encryption begins, or the connection attempt itself can reveal the service type.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
traceroute
Why it's wrong here
traceroute shows path but no banner.
nslookup
Why it's wrong here
nslookup is for DNS queries.
Telnet
ping
Common exam traps
EC-Council often tests the misconception that Telnet is only for remote terminal access on port 23, but the exam expects you to know Telnet can connect to any TCP port for banner grabbing.
Trap categories for this question
Command / output trap
traceroute shows path but no banner.
Detailed technical explanation
When connecting to a service with Telnet, the client sends a TCP SYN to the target IP and port; if the port is open, a three-way handshake completes and the server often sends a banner string before any authentication. Even if the subsequent traffic is encrypted (e.g., TLS handshake), the initial banner may be transmitted in plaintext, allowing service identification. In real-world scenarios, attackers use Telnet to probe non-standard ports like 4444 to identify backdoors or custom services.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CEH 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Footprinting, Reconnaissance and Scanning — This question tests Footprinting, Reconnaissance and Scanning — Read the scenario before looking for a memorised answer..
The correct answer is: Telnet — Telnet can be used to connect to any TCP port, including port 4444, to manually interact with a service and retrieve its banner. Banners often reveal the service name, version, and other identifying information, which is critical for footprinting and reconnaissance. Even though the traffic is encrypted, the initial banner may be sent in cleartext before encryption begins, or the connection attempt itself can reveal the service type.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CEH practice question is part of Courseiva's free EC-Council 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 CEH exam.
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