正解:C
Today the Dynamic Network Architecture Software Defined Access (DNA-SDA) solution requires a fusion router to perform VRF route leaking between user VRFs and Shared-Services, which may be in the Global routing table (GRT) or another VRF. Shared Services may consist of DHCP, Domain Name System (DNS), Network Time Protocol (NTP), Wireless LAN Controller (WLC), Identity Services Engine (ISE), DNAC components which must be made available to other virtual networks (VN's) in the Campus.
Reference: https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/dna- center/213525-sda-steps-to-configure-fusion-router.html