JNCIA-SEC Content Security Practice Question
An administrator configures Antispam with a DNSBL server. After committing the changes, logs show that no antispam queries are being performed. What is the most common reason for this when configuring DNSBL?
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
✓
The system DNS name servers are not configured on the SRX device.
Antispam requires DNS name resolution (DNS servers configured on the SRX) to query external DNSBL servers. Without DNS configured, blacklist queries fail.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The antispam license must be activated using a hardware token.
Why it's wrong here
Licenses are software keys activated via Juniper Agile Licensing, not hardware tokens.
- ✗
The SRX security policy lacks an application ALG for SMTP.
Why it's wrong here
SMTP ALG is not strictly required for basic DNSBL antispam operation.
- ✓
The system DNS name servers are not configured on the SRX device.
Why this is correct
External DNSBL lookups require functional DNS name server configuration on the SRX.
- ✗
The antispam profile must be attached to an interface rather than a UTM policy.
Why it's wrong here
UTM policies attach to security policies, not interfaces.
Visual reference
About these practice questions
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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 Juniper Networks exam blueprint
This JNCIA-SEC practice question is part of Courseiva's free Juniper Networks 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 JNCIA-SEC exam.