- A
SFTP
Why wrong: SFTP is for file transfer over SSH, not shell access.
- B
SSH
SSH provides encrypted remote shell access and is the standard replacement for Telnet.
- C
IPsec
Why wrong: IPsec provides network-layer security, typically used for VPNs.
- D
HTTPS
Why wrong: HTTPS secures HTTP traffic, not remote shell access.
Question 928 of 1,000
SSCP Cryptography Practice Question
This SSCP practice question tests your understanding of 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.
Which protocol is used to provide secure remote shell access and replace Telnet?
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
✓
SSH
SSH (Secure Shell) is the correct answer because it provides encrypted remote shell access and command execution, replacing the insecure Telnet protocol which transmits data in cleartext. SSH uses public-key cryptography for authentication and symmetric encryption (e.g., AES, ChaCha20) for session confidentiality, as defined in RFC 4251.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between SSH (remote shell) and SFTP (file transfer), leading candidates to confuse SFTP as a replacement for Telnet when it actually relies on SSH for its secure transport.
Detailed technical explanation
How to think about this question
SSH operates on TCP port 22 and establishes an encrypted tunnel using a key exchange algorithm (e.g., Diffie-Hellman or ECDH) followed by symmetric encryption. It supports port forwarding, X11 forwarding, and SCP/SFTP subsystems, making it a versatile tool beyond simple shell access. In real-world scenarios, SSH is also used for secure automation (e.g., Ansible, rsync over SSH) and tunneling other protocols.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
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.
- →
Cryptography — study guide chapter
Learn the concepts, then practise the questions
- →
Cryptography practice questions
Targeted practice on this topic area only
- →
All SSCP questions
1,000 questions across all exam domains
- →
Systems Security Certified Practitioner SSCP study guide
Full concept coverage aligned to exam objectives
- →
SSCP practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related SSCP practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Access Controls practice questions
Practise SSCP questions linked to Access Controls.
Risk Identification, Monitoring, and Analysis practice questions
Practise SSCP questions linked to Risk Identification, Monitoring, and Analysis.
Incident Response and Recovery practice questions
Practise SSCP questions linked to Incident Response and Recovery.
Security Operations and Administration practice questions
Practise SSCP questions linked to Security Operations and Administration.
Cryptography practice questions
Practise SSCP questions linked to Cryptography.
Network and Communications Security practice questions
Practise SSCP questions linked to Network and Communications Security.
Systems and Application Security practice questions
Practise SSCP questions linked to Systems and Application Security.
Risk Identification, Monitoring and Analysis practice questions
Practise SSCP questions linked to Risk Identification, Monitoring and Analysis.
SSCP fundamentals practice questions
Practise SSCP questions linked to SSCP fundamentals.
SSCP scenario practice questions
Practise SSCP questions linked to SSCP scenario.
SSCP troubleshooting practice questions
Practise SSCP questions linked to SSCP troubleshooting.
Practice this exam
Start a free SSCP practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this SSCP question test?
Cryptography — This question tests Cryptography — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: SSH — SSH (Secure Shell) is the correct answer because it provides encrypted remote shell access and command execution, replacing the insecure Telnet protocol which transmits data in cleartext. SSH uses public-key cryptography for authentication and symmetric encryption (e.g., AES, ChaCha20) for session confidentiality, as defined in RFC 4251.
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.
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 →
Last reviewed: Jul 4, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.