What ports should be blocked on the firewall to prevent NetBIOS traffic from not coming through the firewall if your network is comprised of Windows NT, 2000, and XP? (Choose all that apply.)
A.
110
B.
135
C.
139
D.
161
E.
445
F.
1024
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Net bios is port 137-139.
Because the question said pick all that applied i also picked 445. As you can see 445 is not really correct.
“This port replaces the notorious Windows NetBIOS trio (ports 137-139), for all versions of Windows after NT, as the preferred port for carrying Windows file sharing and numerous other services.”
Port 135 is not correct at all:
“Microsoft’s DCOM (Distributed, i.e. networked, COM) Service Control Manager (also known as the RPC Endpoint Mapper) uses this port in a manner similar to SUN’s UNIX use of port 111. The SCM server running on the user’s computer opens port 135 and listens for incoming requests from clients wishing to locate the ports where DCOM services can be found on that machine.”
I choose