350-501 Networking Practice Question
A service provider is implementing MAP-T (Mapping of Address and Port using Translation) to transition customers from IPv4 to IPv6. Which two characteristics of MAP-T are true? (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
✓
MAP-T employs a Border Router that performs translation between IPv4 and IPv6
MAP-T uses stateful or stateless translation between IPv4 and IPv6, and it uses a Border Router (BR) that performs translation. MAP-T does not use encapsulation; it uses translation (NAT). MAP-T also uses a Domain Name System (DNS) but that is not unique. The key characteristics: it uses a BR for translation and can be stateless.
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-T is primarily used for IPv6-to-IPv4 communication only
Why it's wrong here
MAP-T supports both IPv6-to-IPv4 and IPv4-to-IPv6 communication.
- ✗
MAP-T requires a dedicated IPv6 prefix for each customer
Why it's wrong here
MAP-T uses shared IPv4 addresses with port ranges; it does not require a dedicated IPv6 prefix per customer.
- ✓
MAP-T employs a Border Router that performs translation between IPv4 and IPv6
Why this is correct
Correct. The BR performs IPv4-IPv6 translation.
- ✗
MAP-T uses encapsulation to transport IPv4 packets over an IPv6 network
Why it's wrong here
MAP-T uses translation (NAT), not encapsulation. Encapsulation is used in MAP-E.
- ✓
MAP-T can operate in stateless mode
Why this is correct
Correct. MAP-T supports stateless translation, where the BR uses a deterministic mapping.
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