Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker network create -d overlay -o encrypted=true <network-name>

Yes. When creating a Docker overlay network using the `docker network create` command with the `-d overlay` driver and the `-o encrypted=true` option, all traffic between Swarm service tasks communicating over this specific network will be encrypted. This uses IPsec to secure data in transit between the nodes.

The `encrypted=true` option for overlay networks is specifically designed to enable encryption of traffic between service tasks on that network, utilizing built-in IPsec capabilities.