350-701 Security Concepts Practice Question
Which three cryptographic algorithms are considered secure for use in modern systems? (Choose three.)
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
✓
ECDSA
AES (symmetric), RSA (asymmetric), and ECDSA (asymmetric) are widely accepted secure algorithms.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ECDSA
Why this is correct
Correct. ECDSA is a secure elliptic curve signature algorithm.
- ✗
MD5
Why it's wrong here
MD5 is considered broken and insecure.
- ✓
RSA
Why this is correct
Correct. RSA with sufficient key size is secure.
- ✗
3DES
Why it's wrong here
3DES is deprecated due to small block size and vulnerabilities.
- ✓
AES
Why this is correct
Correct. AES is a strong symmetric cipher.
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 |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 practice question is part of Courseiva's free Cisco 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 350-701 exam.