This is how it looks on my system:
# Name Service Switch configuration file.
# See nsswitch.conf(5) for details.
passwd: files systemd
group: files systemd
shadow: files
publickey: files
hosts: files mymachines mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns mdns4 myhostname
networks: files
protocols: files
services: files
ethers: files
rpc: files
netgroup: files