GSEC Networking and Protocols Practice Question
A security analyst needs to ensure that sensitive data in transit between two internal servers remains confidential and authenticated. Which protocol provides the most robust security for this requirement?
⚠ Common exam trap
Candidates often choose application-layer protocols like HTTPS or SSH, overlooking that IPsec provides transparent, robust security directly at the network layer for all traffic.
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
✓
IPsec
IPsec provides end-to-end security at the network layer, ensuring that all data between the two endpoints is encrypted and authenticated regardless of the underlying application. This is essential for protecting sensitive traffic within a private network from sniffing or spoofing. Implementing IPsec allows for granular control over traffic security policies, making it a standard requirement for high-security environments where network-level protection is prioritized over application-specific encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Telnet
Why it's wrong here
Telnet transmits data, including authentication credentials, in cleartext. Because it lacks any form of encryption or integrity checking, it is inherently insecure for sensitive communication. Modern security standards mandate the replacement of Telnet with encrypted alternatives like SSH to prevent unauthorized data interception and credential harvesting.
- ✓
IPsec
Why this is correct
IPsec offers a suite of protocols that provide encryption, integrity, and authentication at the network layer. By securing packets between two hosts, it ensures that even if internal traffic is intercepted, the payload remains unreadable and protected from tampering, which is necessary for sensitive data transmission.
- ✗
HTTP
Why it's wrong here
HTTP is an unencrypted protocol used primarily for web traffic. It provides no confidentiality or integrity mechanisms for the data being transferred. Without the addition of TLS, HTTP traffic is susceptible to man-in-the-middle attacks where attackers can easily view or modify the contents of the requests.
- ✗
SNMPv1
Why it's wrong here
SNMPv1 relies on community strings passed in cleartext for authentication. It offers no encryption capabilities, making it unsuitable for protecting sensitive data. The protocol was designed for network management efficiency rather than security, and its use is highly discouraged in environments requiring confidentiality and data integrity.
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
One of 351 original GSEC practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 September 2026 · checked against the official GIAC exam blueprint
This GSEC practice question is part of Courseiva's free GIAC 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 GSEC exam.