CND Application And Data Protection Practice Question
An organization is evaluating methods to secure data in transit across public networks. Which TWO cryptographic protocols or mechanisms provide secure communication channels?
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
✓
Transport Layer Security (TLS v1.3)
TLS (Transport Layer Security) and IPsec (Internet Protocol Security) are standard protocols for securing data in transit across networks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Plaintext Telnet protocol
Why it's wrong here
Telnet transmits all data, including passwords, in cleartext.
- ✗
Unencrypted HTTP protocol
Why it's wrong here
HTTP transmits web traffic without cryptographic protection.
- ✓
Transport Layer Security (TLS v1.3)
Why this is correct
TLS secures application-layer traffic such as HTTPS, SMTPS, and LDAPS.
- ✗
Plaintext File Transfer Protocol (FTP)
Why it's wrong here
FTP transfers files in cleartext without encryption.
- ✓
Internet Protocol Security (IPsec) VPN
Why this is correct
IPsec secures network traffic at the IP layer (Layer 3), creating secure VPN tunnels.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
About these practice questions
Courseiva writes every CND question from scratch — 323 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 and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This CND 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 CND exam.