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Thread: Subnet mask is set to 255.255.255.255. what does this mean?

  1. #1
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    Default Subnet mask is set to 255.255.255.255. what does this mean?

    I'm on gprs now and typed ipconfig/all and i see the subnet mask is set to 255.255.255.255.

    PPP adapter gprs:

    Physical Address.....
    DHCP......
    IP Address........
    Subnet Mask...........255.255.255.255

    What does it mean?

  2. #2
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    IIRC

    means your on a class D network

    used for the intenet internet

    my ip basics rusty bad....

    but the netmasq is a way to sub divide ip addresses into networks and then the number of clients/nodes these networks can hold

    http://www.cisco.com/univercd/cc/td/...ito_doc/ip.htm
    Last edited by Gillion; March 7, 2005 at 10:40 PM.
    Those who do not understand UNIX are doomed to reinvent it poorly.

  3. #3
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    I thought class D wasn't suppose to be in use?

  4. #4
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    no thats calss E I think
    Those who do not understand UNIX are doomed to reinvent it poorly.

  5. #5
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    All PPP or PPTP connect's subnet mask is 255.255.255.255 on MS machines, not sure about *NIX. In a PPP or PPTP connect, a subnet mask is not needed.

    255.255.255.255 is a broadcast address.
    Last edited by juba; March 8, 2005 at 07:42 PM.

  6. #6
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    The subnet mask of 255.255.255.255 means that the ip address specified is the only
    one in said network. Therefor to reach it additional routes has to be specified.
    That type of subnet mask would be used for like a dummy/null interface that routes to
    nowhere.
    point to point links should have a subnet mask of 255.255.255.252 specifying that there
    are only two nodes on that network, your machine and the one you are connected to.
    This is all my ccna reading coming out heh

  7. #7
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    Quote Originally Posted by pogi_2nr
    point to point links should have a subnet mask of 255.255.255.252 specifying that there
    are only two nodes on that network, your machine and the one you are connected to.
    point-to-point and PPP or PPTP are 2 different things. PPP or PPTP does not require a subnet mask.

  8. #8
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    Default Re: Subnet mask is set to 255.255.255.255. what does this mean?

    pptp is a vpn protocol?

    What do you mean by ppp doesnt require a subnet mask?
    If the ppp link is carrying ip packets it requires a subnet mask.

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