This LPIC-2 practice question tests your understanding of file sharing and samba. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO of the following are valid methods to join a Samba server to an Active Directory domain using Samba 4?
`smbpasswd -j`
Why wrong: smbpasswd -j is an old method for NT-style domains and is deprecated.
`winbindd -j`
Why wrong: winbindd does not have a join option.
`net ads join`
The net ads command is used for AD joins.
`samba-tool domain join`
samba-tool is the primary tool for Samba 4 AD operations.
`net rpc join`
Why wrong: net rpc join is for NT4-style classic domain.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
`net ads join`
Option C is correct because `net ads join` is the traditional Samba tool for joining an Active Directory domain using the LDAP and Kerberos protocols over TCP/IP, which is the standard method for Samba 3 and later versions. Option D is correct because `samba-tool domain join` is the native Samba 4 command that directly integrates with the built-in AD domain controller functionality, allowing a Samba server to join an existing AD domain as a member server.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
`smbpasswd -j`
Why it's wrong here
smbpasswd -j is an old method for NT-style domains and is deprecated.
`winbindd -j`
Why it's wrong here
winbindd does not have a join option.
`net ads join`
Why this is correct
The net ads command is used for AD joins.
Related concept
Read the scenario before looking for a memorised answer.
`samba-tool domain join`
Why this is correct
samba-tool is the primary tool for Samba 4 AD operations.
Related concept
Read the scenario before looking for a memorised answer.
`net rpc join`
Why it's wrong here
net rpc join is for NT4-style classic domain.
Common exam traps
The trap here is that candidates often confuse legacy NT4-style join commands (`net rpc join`) with modern AD join methods, or incorrectly assume that `smbpasswd` or `winbindd` have built-in join capabilities, when in fact only `net ads join` and `samba-tool domain join` are valid for Samba 4 AD joins.
Detailed technical explanation
Under the hood, `net ads join` uses Kerberos authentication and LDAP to create a computer account in Active Directory, while `samba-tool domain join` leverages Samba 4's internal AD library to handle the join process, including setting the correct service principal names (SPNs) and DNS records. A subtle behavior is that `samba-tool domain join` can also be used to join a Samba server as a domain controller (DC) replica, whereas `net ads join` is strictly for member servers. In real-world scenarios, using `samba-tool domain join` is preferred for Samba 4 deployments because it ensures proper integration with modern AD features like Kerberos constrained delegation.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
File Sharing and Samba — This question tests File Sharing and Samba — Read the scenario before looking for a memorised answer..
The correct answer is: `net ads join` — Option C is correct because `net ads join` is the traditional Samba tool for joining an Active Directory domain using the LDAP and Kerberos protocols over TCP/IP, which is the standard method for Samba 3 and later versions. Option D is correct because `samba-tool domain join` is the native Samba 4 command that directly integrates with the built-in AD domain controller functionality, allowing a Samba server to join an existing AD domain as a member server.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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