350-501 Services Practice Question
A service provider is using LISP to provide host mobility. Which LISP component is responsible for storing the mapping of EID to RLOC?
⚠ Common exam trap
Cisco often tests the distinction between the Map-Server (which stores the mapping) and the Map-Resolver (which only proxies requests), so the trap here is confusing the resolver's forwarding role with the server's storage role, leading candidates to incorrectly select Map-Resolver.
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
✓
Map-Server
In LISP (RFC 6830), the Map-Server (MS) is the central repository that stores the mapping of Endpoint Identifiers (EIDs) to Routing Locators (RLOCs). When an Ingress Tunnel Router (ITR) needs to forward traffic to a destination EID, it queries the Map-Resolver, which in turn contacts the Map-Server to retrieve the authoritative mapping. The Map-Server also accepts registration from Egress Tunnel Routers (ETRs) on behalf of their EID prefixes, making it the definitive source for EID-to-RLOC bindings.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Map-Server
Why this is correct
Correct. The Map-Server maintains the mapping database for the LISP site.
- ✗
Altitude
Why it's wrong here
Incorrect. Altitude is not a LISP component; it is a term in networking concepts.
- ✗
Tunnel Router
Why it's wrong here
Incorrect. Tunnel routers (ITR/ETR) encapsulate/decapsulate packets but do not store mappings.
- ✗
Map-Resolver
Why it's wrong here
Incorrect. The Map-Resolver receives queries and forwards them to Map-Servers.
Visual reference
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.