Designing Cisco Data Center Infrastructure (DCID) — Question 88

An engineer must design a DNS service available to multiple network zones as a shared service. The network zones are deployed as VRFs within the data center network and no firewall is available for communication between VRFs.

Which protocol is needed to implement the shared services?

Answer options

• A. BGP
• B. OSPF
• C. ISIS
• D. VXLAN

Correct answer: D

Explanation

VXLAN is the correct choice because it enables the creation of a virtual overlay network that allows for layer 2 communication over layer 3 infrastructure, making it ideal for connecting multiple VRFs. BGP, OSPF, and ISIS are routing protocols that do not provide the necessary encapsulation and isolation for shared services across VRFs in this context.