A. Greenfield switch adoption requires cloud-enabled switches with a claim or activation code.
B. Switch adoption uses SSH over TCP port 443.
C. Switch adoption requires Mist A
D. Brownfield switch adoption requires manual adoption and is used for switches that do not have a claim or activation code.
Explanation:
Reference: https://www.juniper.net/documentation/en_US/release-independent/nce/topics/example/nce-177-day0-mist-with-ex-switches.html