JNCIA-SEC Junos OS Security Objects Practice Question
Which THREE types of attacks are mitigated by Junos OS SCREEN options? (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
✓
LAND attacks
SCREEN options protect against IP spoofing, SYN floods, and LAND attacks among other Layer 3/4 threats.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cross-site scripting (XSS) browser exploits
Why it's wrong here
XSS is an application-layer vulnerability handled by IDP.
- ✓
LAND attacks
Why this is correct
LAND attacks are mitigated by SCREEN options.
- ✓
TCP SYN flood attacks
Why this is correct
SYN flood protection is configured in SCREEN profiles.
- ✓
IP spoofing attacks
Why this is correct
IP spoofing detection is a primary SCREEN option.
- ✗
SQL injection web application attacks
Why it's wrong here
SQL injection is an application-layer threat requiring IDP/AppSecure, not basic SCREEN options.
Visual reference
About these practice questions
This JNCIA-SEC question is part of Courseiva's 520-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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 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.