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Q21 Single choice

Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?

A
docker service create --name dns-cache -p 53:53/udp dns-cache
B
docker service create --name dns-cache -p 53:53 --service udp dns-cache
C
docker service create --name dns-cache -p 53:53 ..constraint networking.protocol.udp=true dns-cache
D
docker service create --name dns-cache -p 53:53 --udp dns-cache

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