LFCS · Question #589
When no WINS server is present, all name registrations and lookups are done by UDP _______.
The correct answer is A. broadcast. In the absence of a WINS server, NetBIOS name registrations and lookups rely on UDP broadcasts to communicate with other devices on the local network segment.
Question
Options
- Abroadcast
- Bmulticast
- Cunicast
- DNone of the above.
How the community answered
(61 responses)- A93% (57)
- B2% (1)
- C3% (2)
- D2% (1)
Why each option
In the absence of a WINS server, NetBIOS name registrations and lookups rely on UDP broadcasts to communicate with other devices on the local network segment.
Without a WINS server, NetBIOS over TCP/IP (NetBT) clients revert to using UDP broadcasts (specifically over port 137) for name registration and resolution. This allows devices to discover each other on the local subnet by sending packets to all hosts.
Multicast is a different addressing scheme that targets a group of recipients, not all hosts on a local subnet for basic NetBIOS name resolution.
Unicast is a one-to-one communication, which requires knowing the recipient's IP address beforehand, contrary to the discovery nature of NetBIOS in the absence of WINS.
This is incorrect as broadcast is the method used.
Concept tested: NetBIOS name resolution without WINS
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-netbios-over-tcp-ip
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