ISC2 CC Network Security Practice Question
Which of the following is a security concern associated with the Telnet protocol?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It transmits data in cleartext.
Telnet transmits data, including credentials, in cleartext, making it susceptible to sniffing. SSH is the secure alternative.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It transmits data in cleartext.
Why this is correct
Telnet sends all data unencrypted.
- ✗
It requires certificate management.
Why it's wrong here
Telnet does not use certificates.
- ✗
It is vulnerable to DNS poisoning.
Why it's wrong here
DNS poisoning is a different attack.
- ✗
It uses encryption that is too weak.
Why it's wrong here
Telnet doesn't use encryption at all.
Go deeper
Related to this question
Learn chapter
Introduction to Security Principles
Key term
SSH
SSH (Secure Shell) is a cryptographic network protocol that provides secure, encrypted communication and remote administration between two devices over an unsecured network.
Key term
Telnet
Telnet is a network protocol that provides a bidirectional, interactive text-based communication session between two machines over a network, typically used for remote access and management of network devices.
About these practice questions
Courseiva writes every CC question from scratch — 976 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CC 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 CC exam.