NetBIOS port set used?

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Multiple Choice

NetBIOS port set used?

Explanation:
NetBIOS over TCP/IP relies on three distinct services, each using its own port. The NetBIOS Name Service uses UDP 137 for name registration and resolution, the NetBIOS Datagram Service uses UDP 138 for broadcast datagrams, and the NetBIOS Session Service uses TCP 139 for establishing direct sessions. Because all three services are part of NetBIOS over TCP/IP, the complete port set is 137, 138, and 139. Using only one or two would miss one of the essential components. (Note that SMB can also run over port 445 in modern systems, but the traditional NetBIOS over TCP/IP configuration uses all three ports.)

NetBIOS over TCP/IP relies on three distinct services, each using its own port. The NetBIOS Name Service uses UDP 137 for name registration and resolution, the NetBIOS Datagram Service uses UDP 138 for broadcast datagrams, and the NetBIOS Session Service uses TCP 139 for establishing direct sessions. Because all three services are part of NetBIOS over TCP/IP, the complete port set is 137, 138, and 139. Using only one or two would miss one of the essential components. (Note that SMB can also run over port 445 in modern systems, but the traditional NetBIOS over TCP/IP configuration uses all three ports.)

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