350-501 Security and Services Practice Question
A service provider uses BGP to exchange routes with customers. To prevent the customer from announcing prefixes they do not own (BGP hijacking), which tool should the provider apply on the customer-facing BGP session?
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
✓
Prefix-list and route-map to filter incoming updates
Prefix-lists and route-maps are used to filter incoming BGP advertisements based on prefix and attributes. RPKI validates origin but requires ROA; BGP GSHUT is for maintenance; communities are for tagging.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
BGP Graceful Shutdown
Why it's wrong here
GSHUT is used for maintenance, not for filtering prefixes.
- ✓
Prefix-list and route-map to filter incoming updates
Why this is correct
This explicitly permits only customer-owned prefixes.
- ✗
RPKI Origin Validation only
Why it's wrong here
RPKI helps but requires ROA from the customer; prefix filtering is a basic measure.
- ✗
Set BGP community to tag customer routes
Why it's wrong here
Tagging does not prevent hijacking; it only marks routes.
Go deeper
Related to this question
About these practice questions
One of 971 original 350-501 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 by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 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 350-501 exam.