Designing Cisco Data Center Infrastructure (DCID) — Question 51

An engineer must secure the payload traversing across the DCI. The solution must support confidentiality and integrity and it must be open standard. The solution must encrypt Ethernet frames regardless of the upper layer protocol used.

Which technology must be used to support these requirements?

Answer options

• A. GRE
• B. OTV
• C. MACsec
• D. IPsec

Correct answer: C

Explanation

MACsec is the correct choice as it specifically encrypts Ethernet frames, providing confidentiality and integrity. GRE and OTV do not offer frame-level encryption, and while IPsec provides security, it operates at the network layer rather than directly encrypting Ethernet frames.