Which of the following protocols do Generic Routing Encapsulation (GRE) tunnels support? (Choose all that apply.)
- DECnet
- Systems Network Architecture (SNA)
- IPv4
- IPv6
- MPLS
Explanation: GRE tunnels support the encapsulation of all the listed protocols.
Exam with this question: CCNPv8 ENARSI Chapter 19: Do I Know This Already? Quiz Answers
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