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Solved: my Subnet mask 255.255.255.255 is it possible ??

35K views 15 replies 6 participants last post by  reezin14 
#1 ·
hi i have a dialup connection.
after doing ipconfig i found the following output.
Code:
Windows IP Configuration

PPP adapter dialupinternet:
        Connection-specific DNS Suffix  . : 
        IP Address. . . . . . . . . . . . : 20x.7x.70.117
    Subnet Mask . . . . . . . . . . . : [B]255.255.255.255[/B]       
      Default Gateway . . . . . . . . . : 20x.7x.70.117
i'm a bit confused about my subnet mask how come it be 255.255.255.255 ?? :~
can anybody please make me clear about this matter

Thanks in advance.
 
#3 ·
IIRC the subnet mask 255.255.255.255 means simply that there are no other systems on the same subnet as yours. I've never seen this myself but it sounds like it might be appropriate for a dialup connection.
 
#7 ·
Thanks Calvin-C Thanks John.
i hope my question was not silly, to annoy you .
btw 255.255.255.255 = which class subnet ??
 
#9 ·
255.0.0.0=Class A
255.255.0.0=Class B
255.255.255.0=Class C
255.255.255.255=Sub C subnet
thanks
now can see the clear blue sky :D
 
#13 ·
That's pretty interesting I didn't know you could have a subnet like that.:up: Is this proprietary to dial-up ?
 
#15 ·
^^^ What john said.

It's a /32. Quite normal for loopbacks and dead-end connections.

Dialup, some PPPOE, etc use this for the source IP address of your connection. The actually links et al are unnumbered or are in RFC1918 address space. Loopback connections have used this for > 10 years.

It's becomming quite more commonplace as RIR's are forcing broadband carriers to use up 100% of their address space.
 
#16 ·
This is good stuff to know,I don't hear about things like this at school.
 
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