User's Guide for MS-DOS Clients

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Enhanced Reference
Command and Utility Summary
also log you on in a domain. Logging on also restores connections that
existed at a workstation when the last user logged off, if the persistent
connections feature is in use.
Only one user can log on at a workstation at a time. You can use net logon to
log on with a different username or to log on in a different domain to a
network that supports domains, but you must first log off. If you try to use
net logon when someone is already logged on at the workstation, a prompt
will ask whether you want to log off. You do not need to issue a separate net
logoff command.
NOTE: To view resources on the server, the Windows NT computer or the LAN Manager
server running the Netlogon service and the MS-DOS workstation must both run the
same protocol (for example, NetBEUI). In addition, to log on, this protocol must be
the workstation’s designated first protocol.
About Usernames
If you don’t specify a username with net logon, LAN Manager Enhanced
suggests a username. This username comes from the username entry in the
LANMAN.INI file. If the entry is blank, the computername is suggested.
About Passwords
A password is a confidential word that, together with your username,
establishes your identity and gives you access to resources. When you log on
to the network or connect to a shared resource, your workstation sends the
username and password you specify with net logon to a server for
verification. The server checks to see whether it has an account for you and
whether the logon password you specified matches the password in your
account.
LAN Manager Enhanced uses accounts in two ways. Individual servers use
accounts to limit access to their resources. In a domain, a server maintains an
account for each user. On Windows NT Advanced Servers, you can also use
all resources of Windows NT Advanced Server domains that trust the
domain you are logged on to. Once you log on, you can use all the resources
in the domain to which your account is granted access.