350-501 Security and Services Practice Question
A service provider is implementing security for BGP peering. Which two methods help prevent BGP route hijacking? (Choose two.)
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
✓
RPKI origin validation
Prefix filtering (with prefix-lists and route-maps) ensures only expected prefixes are accepted from peers. RPKI validation provides cryptographic verification of origin AS. Both prevent hijacking.
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 next-hop-self
Why it's wrong here
Next-hop-self changes next-hop but does not prevent hijacking.
- ✗
BGP multipath
Why it's wrong here
Multipath is load balancing.
- ✓
RPKI origin validation
Why this is correct
Validates that the origin AS is authorized.
- ✓
BGP prefix filtering
Why this is correct
Filters unauthorized prefixes from being advertised.
- ✗
BGP GSHUT
Why it's wrong here
GSHUT is for graceful shutdown, not hijacking prevention.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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