netstat -M and netstat -N

ciphwn at ciphwn at
Sun Mar 15 20:56:08 PDT 2009

While looking at the netstat man pages, I saw an interesting option:
>      -M    Extract values associated with the name list from the specified
>            core instead of the default /dev/kmem.
>      -N    Extract the name list from the specified system instead of the
>            default, which is the kernel image the system has booted from.
what do these two options mean? Does it tell netstat to load its values 
somewhere else? This seems to exist only in FreeBSD's version of netstat.
 Thanks in advance.


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