During system troubleshooting, you notice that user authentication seems to bypass the local /etc/passwd file and is directly querying an LDAP server, leading to delays. Which configuration entry should you examine to ensure that local files are checked before LDAP in the name service resolution process?
passwd: files ldap in /etc/nsswitch.conf
passwd: nis files in /etc/nsswitch.conf
passwd: ldap files in /etc/nsswitch.conf
authentication: files ldap in /etc/nsswitch.conf